diff --git a/src/nvim/api/buffer.c b/src/nvim/api/buffer.c
index 26f9a6f592..1b3592679b 100644
--- a/src/nvim/api/buffer.c
+++ b/src/nvim/api/buffer.c
@@ -1,3 +1,6 @@
+// This is an open source non-commercial project. Dear PVS-Studio, please check
+// it. PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
+
 // Much of this code was adapted from 'if_py_both.h' from the original
 // vim source
 #include <stdbool.h>
diff --git a/src/nvim/api/private/dispatch.c b/src/nvim/api/private/dispatch.c
index 9b3bcc380a..f8eebcdb10 100644
--- a/src/nvim/api/private/dispatch.c
+++ b/src/nvim/api/private/dispatch.c
@@ -1,3 +1,6 @@
+// This is an open source non-commercial project. Dear PVS-Studio, please check
+// it. PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
+
 #include <inttypes.h>
 #include <stdbool.h>
 #include <stdint.h>
diff --git a/src/nvim/api/private/handle.c b/src/nvim/api/private/handle.c
index acb0fb332a..eb96192af2 100644
--- a/src/nvim/api/private/handle.c
+++ b/src/nvim/api/private/handle.c
@@ -1,3 +1,6 @@
+// This is an open source non-commercial project. Dear PVS-Studio, please check
+// it. PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
+
 #include <assert.h>
 #include <stdint.h>
 
diff --git a/src/nvim/api/private/helpers.c b/src/nvim/api/private/helpers.c
index fe15b28041..5877b848fc 100644
--- a/src/nvim/api/private/helpers.c
+++ b/src/nvim/api/private/helpers.c
@@ -1,3 +1,6 @@
+// This is an open source non-commercial project. Dear PVS-Studio, please check
+// it. PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
+
 #include <assert.h>
 #include <inttypes.h>
 #include <stdbool.h>
diff --git a/src/nvim/api/tabpage.c b/src/nvim/api/tabpage.c
index 0f0c33f621..29592408fc 100644
--- a/src/nvim/api/tabpage.c
+++ b/src/nvim/api/tabpage.c
@@ -1,3 +1,6 @@
+// This is an open source non-commercial project. Dear PVS-Studio, please check
+// it. PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
+
 #include <stdbool.h>
 #include <stdint.h>
 #include <stdlib.h>
diff --git a/src/nvim/api/ui.c b/src/nvim/api/ui.c
index de60339e5f..3cc2870792 100644
--- a/src/nvim/api/ui.c
+++ b/src/nvim/api/ui.c
@@ -1,3 +1,6 @@
+// This is an open source non-commercial project. Dear PVS-Studio, please check
+// it. PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
+
 #include <assert.h>
 #include <stddef.h>
 #include <stdint.h>
diff --git a/src/nvim/api/vim.c b/src/nvim/api/vim.c
index 6926436d2f..e5ef4a35c1 100644
--- a/src/nvim/api/vim.c
+++ b/src/nvim/api/vim.c
@@ -1,3 +1,6 @@
+// This is an open source non-commercial project. Dear PVS-Studio, please check
+// it. PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
+
 #include <assert.h>
 #include <stdint.h>
 #include <inttypes.h>
diff --git a/src/nvim/api/window.c b/src/nvim/api/window.c
index 3c564ada99..e1bb70ee0d 100644
--- a/src/nvim/api/window.c
+++ b/src/nvim/api/window.c
@@ -1,3 +1,6 @@
+// This is an open source non-commercial project. Dear PVS-Studio, please check
+// it. PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
+
 #include <stdbool.h>
 #include <stdint.h>
 #include <stdlib.h>
diff --git a/src/nvim/arabic.c b/src/nvim/arabic.c
index db97bd9dc4..1ef51d2a2a 100644
--- a/src/nvim/arabic.c
+++ b/src/nvim/arabic.c
@@ -1,3 +1,6 @@
+// This is an open source non-commercial project. Dear PVS-Studio, please check
+// it. PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
+
 /// @file arabic.c
 ///
 /// Functions for Arabic language.
diff --git a/src/nvim/buffer.c b/src/nvim/buffer.c
index 1f44e1adb0..46f2cdac79 100644
--- a/src/nvim/buffer.c
+++ b/src/nvim/buffer.c
@@ -1,3 +1,6 @@
+// This is an open source non-commercial project. Dear PVS-Studio, please check
+// it. PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
+
 /*
  * buffer.c: functions for dealing with the buffer structure
  */
diff --git a/src/nvim/charset.c b/src/nvim/charset.c
index 3037cfe669..ee58e0af91 100644
--- a/src/nvim/charset.c
+++ b/src/nvim/charset.c
@@ -1,3 +1,6 @@
+// This is an open source non-commercial project. Dear PVS-Studio, please check
+// it. PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
+
 /// @file charset.c
 ///
 /// Code related to character sets.
diff --git a/src/nvim/cursor.c b/src/nvim/cursor.c
index 45abd314fc..60002f3cea 100644
--- a/src/nvim/cursor.c
+++ b/src/nvim/cursor.c
@@ -1,3 +1,6 @@
+// This is an open source non-commercial project. Dear PVS-Studio, please check
+// it. PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
+
 #include <stdbool.h>
 #include <inttypes.h>
 
diff --git a/src/nvim/cursor_shape.c b/src/nvim/cursor_shape.c
index 34ee53bf75..24a5672d0f 100644
--- a/src/nvim/cursor_shape.c
+++ b/src/nvim/cursor_shape.c
@@ -1,3 +1,6 @@
+// This is an open source non-commercial project. Dear PVS-Studio, please check
+// it. PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
+
 #include <assert.h>
 #include <stdint.h>
 #include "nvim/vim.h"
diff --git a/src/nvim/diff.c b/src/nvim/diff.c
index 49574fbbfc..0bd3f59cf2 100644
--- a/src/nvim/diff.c
+++ b/src/nvim/diff.c
@@ -1,3 +1,6 @@
+// This is an open source non-commercial project. Dear PVS-Studio, please check
+// it. PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
+
 /// @file diff.c
 ///
 /// Code for diff'ing two, three or four buffers.
diff --git a/src/nvim/digraph.c b/src/nvim/digraph.c
index 66fb525920..32e71f61f7 100644
--- a/src/nvim/digraph.c
+++ b/src/nvim/digraph.c
@@ -1,3 +1,6 @@
+// This is an open source non-commercial project. Dear PVS-Studio, please check
+// it. PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
+
 /// @file digraph.c
 ///
 /// code for digraphs
diff --git a/src/nvim/edit.c b/src/nvim/edit.c
index 51d0847bc7..678fa851eb 100644
--- a/src/nvim/edit.c
+++ b/src/nvim/edit.c
@@ -1,3 +1,6 @@
+// This is an open source non-commercial project. Dear PVS-Studio, please check
+// it. PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
+
 /*
  * edit.c: functions for Insert mode
  */
diff --git a/src/nvim/eval.c b/src/nvim/eval.c
index dcbd7ab152..16f054957f 100644
--- a/src/nvim/eval.c
+++ b/src/nvim/eval.c
@@ -1,3 +1,6 @@
+// This is an open source non-commercial project. Dear PVS-Studio, please check
+// it. PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
+
 /*
  * eval.c: Expression evaluation.
  */
diff --git a/src/nvim/eval/decode.c b/src/nvim/eval/decode.c
index a7dc6b205d..8905317f15 100644
--- a/src/nvim/eval/decode.c
+++ b/src/nvim/eval/decode.c
@@ -1,3 +1,6 @@
+// This is an open source non-commercial project. Dear PVS-Studio, please check
+// it. PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
+
 #include <stddef.h>
 
 #include <msgpack.h>
diff --git a/src/nvim/eval/encode.c b/src/nvim/eval/encode.c
index d74913a481..e32f893faa 100644
--- a/src/nvim/eval/encode.c
+++ b/src/nvim/eval/encode.c
@@ -1,3 +1,6 @@
+// This is an open source non-commercial project. Dear PVS-Studio, please check
+// it. PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
+
 /// @file encode.c
 ///
 /// File containing functions for encoding and decoding VimL values.
diff --git a/src/nvim/eval/executor.c b/src/nvim/eval/executor.c
index ec6c86ac64..91bb61323f 100644
--- a/src/nvim/eval/executor.c
+++ b/src/nvim/eval/executor.c
@@ -1,3 +1,6 @@
+// This is an open source non-commercial project. Dear PVS-Studio, please check
+// it. PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
+
 #include "nvim/eval/typval.h"
 #include "nvim/eval/executor.h"
 #include "nvim/eval.h"
diff --git a/src/nvim/eval/gc.c b/src/nvim/eval/gc.c
index 5ce52ddd70..2bbf78d827 100644
--- a/src/nvim/eval/gc.c
+++ b/src/nvim/eval/gc.c
@@ -1,3 +1,6 @@
+// This is an open source non-commercial project. Dear PVS-Studio, please check
+// it. PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
+
 #include "nvim/eval/typval.h"
 #include "nvim/eval/gc.h"
 
diff --git a/src/nvim/eval/typval.c b/src/nvim/eval/typval.c
index 70ec3dfe39..a57dd42f6e 100644
--- a/src/nvim/eval/typval.c
+++ b/src/nvim/eval/typval.c
@@ -1,3 +1,6 @@
+// This is an open source non-commercial project. Dear PVS-Studio, please check
+// it. PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
+
 #include <stdio.h>
 #include <stddef.h>
 #include <string.h>
diff --git a/src/nvim/event/libuv_process.c b/src/nvim/event/libuv_process.c
index f5a41d151b..3116adbde8 100644
--- a/src/nvim/event/libuv_process.c
+++ b/src/nvim/event/libuv_process.c
@@ -1,3 +1,6 @@
+// This is an open source non-commercial project. Dear PVS-Studio, please check
+// it. PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
+
 #include <assert.h>
 
 #include <uv.h>
diff --git a/src/nvim/event/loop.c b/src/nvim/event/loop.c
index 0e1775d01b..6963978581 100644
--- a/src/nvim/event/loop.c
+++ b/src/nvim/event/loop.c
@@ -1,3 +1,6 @@
+// This is an open source non-commercial project. Dear PVS-Studio, please check
+// it. PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
+
 #include <stdarg.h>
 #include <stdint.h>
 
diff --git a/src/nvim/event/multiqueue.c b/src/nvim/event/multiqueue.c
index 79b4dd9458..a17bae31e3 100644
--- a/src/nvim/event/multiqueue.c
+++ b/src/nvim/event/multiqueue.c
@@ -1,3 +1,6 @@
+// This is an open source non-commercial project. Dear PVS-Studio, please check
+// it. PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
+
 // Multi-level queue for selective async event processing.
 // Not threadsafe; access must be synchronized externally.
 //
diff --git a/src/nvim/event/process.c b/src/nvim/event/process.c
index 4429a65f92..ffda10a494 100644
--- a/src/nvim/event/process.c
+++ b/src/nvim/event/process.c
@@ -1,3 +1,6 @@
+// This is an open source non-commercial project. Dear PVS-Studio, please check
+// it. PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
+
 #include <assert.h>
 #include <stdlib.h>
 
diff --git a/src/nvim/event/rstream.c b/src/nvim/event/rstream.c
index 2737dad305..854af474b2 100644
--- a/src/nvim/event/rstream.c
+++ b/src/nvim/event/rstream.c
@@ -1,3 +1,6 @@
+// This is an open source non-commercial project. Dear PVS-Studio, please check
+// it. PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
+
 #include <assert.h>
 #include <stdint.h>
 #include <stdbool.h>
diff --git a/src/nvim/event/signal.c b/src/nvim/event/signal.c
index 11ce15a882..fec46da4ff 100644
--- a/src/nvim/event/signal.c
+++ b/src/nvim/event/signal.c
@@ -1,3 +1,6 @@
+// This is an open source non-commercial project. Dear PVS-Studio, please check
+// it. PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
+
 #include <uv.h>
 
 #include "nvim/event/loop.h"
diff --git a/src/nvim/event/socket.c b/src/nvim/event/socket.c
index 8f9327f3d4..e536d79a2a 100644
--- a/src/nvim/event/socket.c
+++ b/src/nvim/event/socket.c
@@ -1,3 +1,6 @@
+// This is an open source non-commercial project. Dear PVS-Studio, please check
+// it. PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
+
 #include <assert.h>
 #include <stdint.h>
 
diff --git a/src/nvim/event/stream.c b/src/nvim/event/stream.c
index 26083c20f4..860a957b3e 100644
--- a/src/nvim/event/stream.c
+++ b/src/nvim/event/stream.c
@@ -1,3 +1,6 @@
+// This is an open source non-commercial project. Dear PVS-Studio, please check
+// it. PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
+
 #include <assert.h>
 #include <stdio.h>
 #include <stdbool.h>
diff --git a/src/nvim/event/time.c b/src/nvim/event/time.c
index 77260546db..80289c27d1 100644
--- a/src/nvim/event/time.c
+++ b/src/nvim/event/time.c
@@ -1,3 +1,6 @@
+// This is an open source non-commercial project. Dear PVS-Studio, please check
+// it. PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
+
 #include <stdint.h>
 
 #include <uv.h>
diff --git a/src/nvim/event/wstream.c b/src/nvim/event/wstream.c
index fc7aad8eb9..f453e5898d 100644
--- a/src/nvim/event/wstream.c
+++ b/src/nvim/event/wstream.c
@@ -1,3 +1,6 @@
+// This is an open source non-commercial project. Dear PVS-Studio, please check
+// it. PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
+
 #include <assert.h>
 #include <stdint.h>
 #include <stdbool.h>
diff --git a/src/nvim/ex_cmds.c b/src/nvim/ex_cmds.c
index 9a847a4c0a..117ef6a507 100644
--- a/src/nvim/ex_cmds.c
+++ b/src/nvim/ex_cmds.c
@@ -1,3 +1,6 @@
+// This is an open source non-commercial project. Dear PVS-Studio, please check
+// it. PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
+
 /*
  * ex_cmds.c: some functions for command line commands
  */
diff --git a/src/nvim/ex_cmds2.c b/src/nvim/ex_cmds2.c
index eeace789b2..a1a32d9f52 100644
--- a/src/nvim/ex_cmds2.c
+++ b/src/nvim/ex_cmds2.c
@@ -1,3 +1,6 @@
+// This is an open source non-commercial project. Dear PVS-Studio, please check
+// it. PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
+
 /// @file ex_cmds2.c
 ///
 /// Some more functions for command line commands
diff --git a/src/nvim/ex_docmd.c b/src/nvim/ex_docmd.c
index 17b3b512ef..7568d71ac0 100644
--- a/src/nvim/ex_docmd.c
+++ b/src/nvim/ex_docmd.c
@@ -1,3 +1,6 @@
+// This is an open source non-commercial project. Dear PVS-Studio, please check
+// it. PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
+
 /*
  * ex_docmd.c: functions for executing an Ex command line.
  */
diff --git a/src/nvim/ex_eval.c b/src/nvim/ex_eval.c
index 65112c4dd8..5d664b94a8 100644
--- a/src/nvim/ex_eval.c
+++ b/src/nvim/ex_eval.c
@@ -1,3 +1,6 @@
+// This is an open source non-commercial project. Dear PVS-Studio, please check
+// it. PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
+
 // TODO(ZyX-I): move to eval/executor
 
 /// @file ex_eval.c
diff --git a/src/nvim/ex_getln.c b/src/nvim/ex_getln.c
index 0b6036ace9..1affdb2fe7 100644
--- a/src/nvim/ex_getln.c
+++ b/src/nvim/ex_getln.c
@@ -1,3 +1,6 @@
+// This is an open source non-commercial project. Dear PVS-Studio, please check
+// it. PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
+
 /*
  * ex_getln.c: Functions for entering and editing an Ex command line.
  */
diff --git a/src/nvim/farsi.c b/src/nvim/farsi.c
index 2d37d1284e..1053cb3ac2 100644
--- a/src/nvim/farsi.c
+++ b/src/nvim/farsi.c
@@ -1,3 +1,6 @@
+// This is an open source non-commercial project. Dear PVS-Studio, please check
+// it. PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
+
 /// @file farsi.c
 ///
 /// Functions for Farsi language
diff --git a/src/nvim/file_search.c b/src/nvim/file_search.c
index db745bdd15..8094a1b266 100644
--- a/src/nvim/file_search.c
+++ b/src/nvim/file_search.c
@@ -1,3 +1,6 @@
+// This is an open source non-commercial project. Dear PVS-Studio, please check
+// it. PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
+
 // File searching functions for 'path', 'tags' and 'cdpath' options.
 //
 // External visible functions:
diff --git a/src/nvim/fileio.c b/src/nvim/fileio.c
index 74fa5aa1de..3e062aecc0 100644
--- a/src/nvim/fileio.c
+++ b/src/nvim/fileio.c
@@ -1,3 +1,6 @@
+// This is an open source non-commercial project. Dear PVS-Studio, please check
+// it. PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
+
 /*
  * fileio.c: read from and write to a file
  */
diff --git a/src/nvim/fold.c b/src/nvim/fold.c
index 34db4d2171..2aa9a9cb5e 100644
--- a/src/nvim/fold.c
+++ b/src/nvim/fold.c
@@ -1,3 +1,6 @@
+// This is an open source non-commercial project. Dear PVS-Studio, please check
+// it. PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
+
 // vim: set fdm=marker fdl=1 fdc=3
 
 /*
diff --git a/src/nvim/garray.c b/src/nvim/garray.c
index 9ed3b901ef..2d2af54c95 100644
--- a/src/nvim/garray.c
+++ b/src/nvim/garray.c
@@ -1,3 +1,6 @@
+// This is an open source non-commercial project. Dear PVS-Studio, please check
+// it. PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
+
 /// @file garray.c
 ///
 /// Functions for handling growing arrays.
diff --git a/src/nvim/getchar.c b/src/nvim/getchar.c
index e056ff488c..9d32df5a68 100644
--- a/src/nvim/getchar.c
+++ b/src/nvim/getchar.c
@@ -1,3 +1,6 @@
+// This is an open source non-commercial project. Dear PVS-Studio, please check
+// it. PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
+
 /*
  * getchar.c
  *
diff --git a/src/nvim/hardcopy.c b/src/nvim/hardcopy.c
index b2cbe30a43..abc4773d84 100644
--- a/src/nvim/hardcopy.c
+++ b/src/nvim/hardcopy.c
@@ -1,3 +1,6 @@
+// This is an open source non-commercial project. Dear PVS-Studio, please check
+// it. PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
+
 /*
  * hardcopy.c: printing to paper
  */
diff --git a/src/nvim/hashtab.c b/src/nvim/hashtab.c
index 354c9718ba..3397788b00 100644
--- a/src/nvim/hashtab.c
+++ b/src/nvim/hashtab.c
@@ -1,3 +1,6 @@
+// This is an open source non-commercial project. Dear PVS-Studio, please check
+// it. PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
+
 /// @file hashtab.c
 ///
 /// Handling of a hashtable with Vim-specific properties.
diff --git a/src/nvim/if_cscope.c b/src/nvim/if_cscope.c
index b647b8146a..e1c7df9175 100644
--- a/src/nvim/if_cscope.c
+++ b/src/nvim/if_cscope.c
@@ -1,3 +1,6 @@
+// This is an open source non-commercial project. Dear PVS-Studio, please check
+// it. PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
+
 /*
  * CSCOPE support for Vim added by Andy Kahn <kahn@zk3.dec.com>
  * Ported to Win32 by Sergey Khorev <sergey.khorev@gmail.com>
diff --git a/src/nvim/indent.c b/src/nvim/indent.c
index 8fbad38495..5471b41b2c 100644
--- a/src/nvim/indent.c
+++ b/src/nvim/indent.c
@@ -1,3 +1,6 @@
+// This is an open source non-commercial project. Dear PVS-Studio, please check
+// it. PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
+
 #include <assert.h>
 #include <inttypes.h>
 #include <stdbool.h>
diff --git a/src/nvim/indent_c.c b/src/nvim/indent_c.c
index 8f5547544d..4806f46705 100644
--- a/src/nvim/indent_c.c
+++ b/src/nvim/indent_c.c
@@ -1,3 +1,6 @@
+// This is an open source non-commercial project. Dear PVS-Studio, please check
+// it. PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
+
 #include <assert.h>
 #include <inttypes.h>
 #include <stdint.h>
diff --git a/src/nvim/keymap.c b/src/nvim/keymap.c
index 72b0d0aa40..0fe2ffe6f2 100644
--- a/src/nvim/keymap.c
+++ b/src/nvim/keymap.c
@@ -1,3 +1,6 @@
+// This is an open source non-commercial project. Dear PVS-Studio, please check
+// it. PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
+
 #include <assert.h>
 #include <inttypes.h>
 #include <limits.h>
diff --git a/src/nvim/log.c b/src/nvim/log.c
index bbb4dfb944..d059e28d5d 100644
--- a/src/nvim/log.c
+++ b/src/nvim/log.c
@@ -1,3 +1,6 @@
+// This is an open source non-commercial project. Dear PVS-Studio, please check
+// it. PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
+
 #include <assert.h>
 #include <inttypes.h>
 #include <stdarg.h>
diff --git a/src/nvim/main.c b/src/nvim/main.c
index 7ad42d6776..1095d4d3b5 100644
--- a/src/nvim/main.c
+++ b/src/nvim/main.c
@@ -1,3 +1,6 @@
+// This is an open source non-commercial project. Dear PVS-Studio, please check
+// it. PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
+
 #define EXTERN
 #include <assert.h>
 #include <stdint.h>
diff --git a/src/nvim/map.c b/src/nvim/map.c
index 73af487f90..54a9e559af 100644
--- a/src/nvim/map.c
+++ b/src/nvim/map.c
@@ -1,3 +1,6 @@
+// This is an open source non-commercial project. Dear PVS-Studio, please check
+// it. PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
+
 #include <stdlib.h>
 #include <stdbool.h>
 #include <string.h>
diff --git a/src/nvim/mark.c b/src/nvim/mark.c
index ae94ec7ecd..675fe4d57f 100644
--- a/src/nvim/mark.c
+++ b/src/nvim/mark.c
@@ -1,3 +1,6 @@
+// This is an open source non-commercial project. Dear PVS-Studio, please check
+// it. PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
+
 /*
  * mark.c: functions for setting marks and jumping to them
  */
diff --git a/src/nvim/mbyte.c b/src/nvim/mbyte.c
index b18459a2b5..b21ec944c1 100644
--- a/src/nvim/mbyte.c
+++ b/src/nvim/mbyte.c
@@ -1,3 +1,6 @@
+// This is an open source non-commercial project. Dear PVS-Studio, please check
+// it. PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
+
 /// mbyte.c: Code specifically for handling multi-byte characters.
 /// Multibyte extensions partly by Sung-Hoon Baek
 ///
diff --git a/src/nvim/memfile.c b/src/nvim/memfile.c
index 5d6639c4d0..efaf1f94c5 100644
--- a/src/nvim/memfile.c
+++ b/src/nvim/memfile.c
@@ -1,3 +1,6 @@
+// This is an open source non-commercial project. Dear PVS-Studio, please check
+// it. PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
+
 /// An abstraction to handle blocks of memory which can be stored in a file.
 /// This is the implementation of a sort of virtual memory.
 ///
diff --git a/src/nvim/memline.c b/src/nvim/memline.c
index b31ca136dd..40a6761225 100644
--- a/src/nvim/memline.c
+++ b/src/nvim/memline.c
@@ -1,3 +1,6 @@
+// This is an open source non-commercial project. Dear PVS-Studio, please check
+// it. PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
+
 /* for debugging */
 /* #define CHECK(c, s)	if (c) EMSG(s) */
 #define CHECK(c, s)
diff --git a/src/nvim/memory.c b/src/nvim/memory.c
index 85ec916ba0..0ee4776581 100644
--- a/src/nvim/memory.c
+++ b/src/nvim/memory.c
@@ -1,3 +1,6 @@
+// This is an open source non-commercial project. Dear PVS-Studio, please check
+// it. PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
+
  // Various routines dealing with allocation and deallocation of memory.
 
 #include <assert.h>
diff --git a/src/nvim/menu.c b/src/nvim/menu.c
index 529978e3f0..4e621b49c1 100644
--- a/src/nvim/menu.c
+++ b/src/nvim/menu.c
@@ -1,3 +1,6 @@
+// This is an open source non-commercial project. Dear PVS-Studio, please check
+// it. PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
+
 /*
  * Code for menus.  Used for the GUI and 'wildmenu'.
  * GUI/Motif support by Robert Webb
diff --git a/src/nvim/message.c b/src/nvim/message.c
index 42e1fd1cf9..146937c25a 100644
--- a/src/nvim/message.c
+++ b/src/nvim/message.c
@@ -1,3 +1,6 @@
+// This is an open source non-commercial project. Dear PVS-Studio, please check
+// it. PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
+
 /*
  * message.c: functions for displaying messages on the command line
  */
diff --git a/src/nvim/misc1.c b/src/nvim/misc1.c
index 8d93505be3..6de74fddf2 100644
--- a/src/nvim/misc1.c
+++ b/src/nvim/misc1.c
@@ -1,3 +1,6 @@
+// This is an open source non-commercial project. Dear PVS-Studio, please check
+// it. PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
+
 /*
  * misc1.c: functions that didn't seem to fit elsewhere
  */
diff --git a/src/nvim/mouse.c b/src/nvim/mouse.c
index 2ebe199f47..6088488388 100644
--- a/src/nvim/mouse.c
+++ b/src/nvim/mouse.c
@@ -1,3 +1,6 @@
+// This is an open source non-commercial project. Dear PVS-Studio, please check
+// it. PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
+
 #include <stdbool.h>
 
 #include "nvim/mouse.h"
diff --git a/src/nvim/move.c b/src/nvim/move.c
index 4feabf624b..d5be4cb8c3 100644
--- a/src/nvim/move.c
+++ b/src/nvim/move.c
@@ -1,3 +1,6 @@
+// This is an open source non-commercial project. Dear PVS-Studio, please check
+// it. PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
+
 /*
  * move.c: Functions for moving the cursor and scrolling text.
  *
diff --git a/src/nvim/msgpack_rpc/channel.c b/src/nvim/msgpack_rpc/channel.c
index 259dcc523c..b2c6ef852c 100644
--- a/src/nvim/msgpack_rpc/channel.c
+++ b/src/nvim/msgpack_rpc/channel.c
@@ -1,3 +1,6 @@
+// This is an open source non-commercial project. Dear PVS-Studio, please check
+// it. PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
+
 #include <stdbool.h>
 #include <string.h>
 #include <inttypes.h>
diff --git a/src/nvim/msgpack_rpc/helpers.c b/src/nvim/msgpack_rpc/helpers.c
index 4d8a9984e1..967ce31c1b 100644
--- a/src/nvim/msgpack_rpc/helpers.c
+++ b/src/nvim/msgpack_rpc/helpers.c
@@ -1,3 +1,6 @@
+// This is an open source non-commercial project. Dear PVS-Studio, please check
+// it. PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
+
 #include <stdint.h>
 #include <stdbool.h>
 #include <inttypes.h>
diff --git a/src/nvim/msgpack_rpc/server.c b/src/nvim/msgpack_rpc/server.c
index d7c2926a0f..b6958088ca 100644
--- a/src/nvim/msgpack_rpc/server.c
+++ b/src/nvim/msgpack_rpc/server.c
@@ -1,3 +1,6 @@
+// This is an open source non-commercial project. Dear PVS-Studio, please check
+// it. PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
+
 #include <assert.h>
 #include <stdlib.h>
 #include <string.h>
diff --git a/src/nvim/normal.c b/src/nvim/normal.c
index 7f087dcd20..51da9429b6 100644
--- a/src/nvim/normal.c
+++ b/src/nvim/normal.c
@@ -1,3 +1,6 @@
+// This is an open source non-commercial project. Dear PVS-Studio, please check
+// it. PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
+
 /*
  * normal.c:	Contains the main routine for processing characters in command
  *		mode.  Communicates closely with the code in ops.c to handle
diff --git a/src/nvim/ops.c b/src/nvim/ops.c
index 6ea3a45049..c77781b1d1 100644
--- a/src/nvim/ops.c
+++ b/src/nvim/ops.c
@@ -1,3 +1,6 @@
+// This is an open source non-commercial project. Dear PVS-Studio, please check
+// it. PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
+
 /*
  * ops.c: implementation of various operators: op_shift, op_delete, op_tilde,
  *        op_change, op_yank, do_put, do_join
diff --git a/src/nvim/option.c b/src/nvim/option.c
index 0070a0056d..bade4af8e3 100644
--- a/src/nvim/option.c
+++ b/src/nvim/option.c
@@ -1,3 +1,6 @@
+// This is an open source non-commercial project. Dear PVS-Studio, please check
+// it. PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
+
 // User-settable options. Checklist for adding a new option:
 // - Put it in options.lua
 // - For a global option: Add a variable for it in option_defs.h.
diff --git a/src/nvim/os/dl.c b/src/nvim/os/dl.c
index fef02cc784..267cf5ae4b 100644
--- a/src/nvim/os/dl.c
+++ b/src/nvim/os/dl.c
@@ -1,3 +1,6 @@
+// This is an open source non-commercial project. Dear PVS-Studio, please check
+// it. PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
+
 /// Functions for using external native libraries
 
 #include <stdbool.h>
diff --git a/src/nvim/os/env.c b/src/nvim/os/env.c
index f3187de182..72bd0bf788 100644
--- a/src/nvim/os/env.c
+++ b/src/nvim/os/env.c
@@ -1,3 +1,6 @@
+// This is an open source non-commercial project. Dear PVS-Studio, please check
+// it. PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
+
 // Environment inspection
 
 #include <assert.h>
diff --git a/src/nvim/os/fileio.c b/src/nvim/os/fileio.c
index 27eb448c3d..4309ac723c 100644
--- a/src/nvim/os/fileio.c
+++ b/src/nvim/os/fileio.c
@@ -1,3 +1,6 @@
+// This is an open source non-commercial project. Dear PVS-Studio, please check
+// it. PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
+
 /// @file fileio.c
 ///
 /// Buffered reading/writing to a file. Unlike fileio.c this is not dealing with
diff --git a/src/nvim/os/fs.c b/src/nvim/os/fs.c
index c33e1140e8..c39ff5d358 100644
--- a/src/nvim/os/fs.c
+++ b/src/nvim/os/fs.c
@@ -1,3 +1,6 @@
+// This is an open source non-commercial project. Dear PVS-Studio, please check
+// it. PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
+
 // fs.c -- filesystem access
 #include <stdbool.h>
 #include <stddef.h>
diff --git a/src/nvim/os/input.c b/src/nvim/os/input.c
index 5f0f2ec677..80457eaa14 100644
--- a/src/nvim/os/input.c
+++ b/src/nvim/os/input.c
@@ -1,3 +1,6 @@
+// This is an open source non-commercial project. Dear PVS-Studio, please check
+// it. PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
+
 #include <assert.h>
 #include <string.h>
 #include <stdbool.h>
diff --git a/src/nvim/os/mem.c b/src/nvim/os/mem.c
index 871ece7a0e..eccb3c97e5 100644
--- a/src/nvim/os/mem.c
+++ b/src/nvim/os/mem.c
@@ -1,3 +1,6 @@
+// This is an open source non-commercial project. Dear PVS-Studio, please check
+// it. PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
+
 /// Functions for accessing system memory information.
 
 #include <uv.h>
diff --git a/src/nvim/os/pty_process_unix.c b/src/nvim/os/pty_process_unix.c
index 71a5e13de5..eb9335b03c 100644
--- a/src/nvim/os/pty_process_unix.c
+++ b/src/nvim/os/pty_process_unix.c
@@ -1,3 +1,6 @@
+// This is an open source non-commercial project. Dear PVS-Studio, please check
+// it. PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
+
 // Some of the code came from pangoterm and libuv
 #include <stdbool.h>
 #include <stdlib.h>
diff --git a/src/nvim/os/shell.c b/src/nvim/os/shell.c
index 29c0431521..fc8ab7dc8f 100644
--- a/src/nvim/os/shell.c
+++ b/src/nvim/os/shell.c
@@ -1,3 +1,6 @@
+// This is an open source non-commercial project. Dear PVS-Studio, please check
+// it. PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
+
 #include <string.h>
 #include <assert.h>
 #include <stdbool.h>
diff --git a/src/nvim/os/signal.c b/src/nvim/os/signal.c
index 1ac6d3f5e1..fd6d3b32e4 100644
--- a/src/nvim/os/signal.c
+++ b/src/nvim/os/signal.c
@@ -1,3 +1,6 @@
+// This is an open source non-commercial project. Dear PVS-Studio, please check
+// it. PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
+
 #include <assert.h>
 #include <stdbool.h>
 
diff --git a/src/nvim/os/stdpaths.c b/src/nvim/os/stdpaths.c
index afb9bdec31..a41fb7c621 100644
--- a/src/nvim/os/stdpaths.c
+++ b/src/nvim/os/stdpaths.c
@@ -1,3 +1,6 @@
+// This is an open source non-commercial project. Dear PVS-Studio, please check
+// it. PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
+
 #include <stdbool.h>
 
 #include "nvim/os/stdpaths_defs.h"
diff --git a/src/nvim/os/time.c b/src/nvim/os/time.c
index 8ce2ecf4f4..c471352c02 100644
--- a/src/nvim/os/time.c
+++ b/src/nvim/os/time.c
@@ -1,3 +1,6 @@
+// This is an open source non-commercial project. Dear PVS-Studio, please check
+// it. PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
+
 #include <assert.h>
 #include <stdint.h>
 #include <stdbool.h>
diff --git a/src/nvim/os/users.c b/src/nvim/os/users.c
index 1c94ef0067..82bb918f70 100644
--- a/src/nvim/os/users.c
+++ b/src/nvim/os/users.c
@@ -1,3 +1,6 @@
+// This is an open source non-commercial project. Dear PVS-Studio, please check
+// it. PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
+
 // users.c -- operating system user information
 
 #include <uv.h>
diff --git a/src/nvim/os_unix.c b/src/nvim/os_unix.c
index acd86f06dc..c5a42204be 100644
--- a/src/nvim/os_unix.c
+++ b/src/nvim/os_unix.c
@@ -1,3 +1,6 @@
+// This is an open source non-commercial project. Dear PVS-Studio, please check
+// it. PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
+
 /*
  * os_unix.c -- code for all flavors of Unix (BSD, SYSV, SVR4, POSIX, ...)
  *
diff --git a/src/nvim/path.c b/src/nvim/path.c
index 205fc2ed62..12952f49db 100644
--- a/src/nvim/path.c
+++ b/src/nvim/path.c
@@ -1,3 +1,6 @@
+// This is an open source non-commercial project. Dear PVS-Studio, please check
+// it. PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
+
 #include <assert.h>
 #include <inttypes.h>
 #include <stdbool.h>
diff --git a/src/nvim/popupmnu.c b/src/nvim/popupmnu.c
index 6346951c05..6e81c5a171 100644
--- a/src/nvim/popupmnu.c
+++ b/src/nvim/popupmnu.c
@@ -1,3 +1,6 @@
+// This is an open source non-commercial project. Dear PVS-Studio, please check
+// it. PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
+
 /// @file popupmnu.c
 ///
 /// Popup menu (PUM)
diff --git a/src/nvim/profile.c b/src/nvim/profile.c
index 97d7d77359..8fb8e92add 100644
--- a/src/nvim/profile.c
+++ b/src/nvim/profile.c
@@ -1,3 +1,6 @@
+// This is an open source non-commercial project. Dear PVS-Studio, please check
+// it. PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
+
 #include <stdio.h>
 #include <math.h>
 #include <assert.h>
diff --git a/src/nvim/quickfix.c b/src/nvim/quickfix.c
index 1241841885..112498ae20 100644
--- a/src/nvim/quickfix.c
+++ b/src/nvim/quickfix.c
@@ -1,3 +1,6 @@
+// This is an open source non-commercial project. Dear PVS-Studio, please check
+// it. PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
+
 /*
  * quickfix.c: functions for quickfix mode, using a file with error messages
  */
diff --git a/src/nvim/rbuffer.c b/src/nvim/rbuffer.c
index 111af0d0fb..18d453cbe9 100644
--- a/src/nvim/rbuffer.c
+++ b/src/nvim/rbuffer.c
@@ -1,3 +1,6 @@
+// This is an open source non-commercial project. Dear PVS-Studio, please check
+// it. PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
+
 #include <assert.h>
 #include <stddef.h>
 #include <string.h>
diff --git a/src/nvim/regexp.c b/src/nvim/regexp.c
index 7be89c2d7e..7a00ee27bb 100644
--- a/src/nvim/regexp.c
+++ b/src/nvim/regexp.c
@@ -1,3 +1,6 @@
+// This is an open source non-commercial project. Dear PVS-Studio, please check
+// it. PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
+
 /*
  * Handling of regular expressions: vim_regcomp(), vim_regexec(), vim_regsub()
  *
diff --git a/src/nvim/regexp_nfa.c b/src/nvim/regexp_nfa.c
index 506e6277e9..139772d51e 100644
--- a/src/nvim/regexp_nfa.c
+++ b/src/nvim/regexp_nfa.c
@@ -1,3 +1,6 @@
+// This is an open source non-commercial project. Dear PVS-Studio, please check
+// it. PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
+
 /*
  * NFA regular expression implementation.
  *
diff --git a/src/nvim/screen.c b/src/nvim/screen.c
index a8993be4e5..818c2c577d 100644
--- a/src/nvim/screen.c
+++ b/src/nvim/screen.c
@@ -1,3 +1,6 @@
+// This is an open source non-commercial project. Dear PVS-Studio, please check
+// it. PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
+
 /*
  * screen.c: code for displaying on the screen
  *
diff --git a/src/nvim/search.c b/src/nvim/search.c
index 91a558045f..c662e3ba40 100644
--- a/src/nvim/search.c
+++ b/src/nvim/search.c
@@ -1,3 +1,6 @@
+// This is an open source non-commercial project. Dear PVS-Studio, please check
+// it. PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
+
 /*
  * search.c: code for normal mode searching commands
  */
diff --git a/src/nvim/sha256.c b/src/nvim/sha256.c
index c72dafd08e..a2378cc202 100644
--- a/src/nvim/sha256.c
+++ b/src/nvim/sha256.c
@@ -1,3 +1,6 @@
+// This is an open source non-commercial project. Dear PVS-Studio, please check
+// it. PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
+
 /// @file sha256.c
 ///
 /// FIPS-180-2 compliant SHA-256 implementation
diff --git a/src/nvim/shada.c b/src/nvim/shada.c
index 8c5d6dff65..a6d8cb6563 100644
--- a/src/nvim/shada.c
+++ b/src/nvim/shada.c
@@ -1,3 +1,6 @@
+// This is an open source non-commercial project. Dear PVS-Studio, please check
+// it. PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
+
 #include <stdlib.h>
 #include <stddef.h>
 #include <stdbool.h>
diff --git a/src/nvim/spell.c b/src/nvim/spell.c
index 17016be35f..25ae562e65 100644
--- a/src/nvim/spell.c
+++ b/src/nvim/spell.c
@@ -1,3 +1,6 @@
+// This is an open source non-commercial project. Dear PVS-Studio, please check
+// it. PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
+
 // spell.c: code for spell checking
 //
 // See spellfile.c for the Vim spell file format.
diff --git a/src/nvim/spellfile.c b/src/nvim/spellfile.c
index 1da71dc4f9..d34d69b3a4 100644
--- a/src/nvim/spellfile.c
+++ b/src/nvim/spellfile.c
@@ -1,3 +1,6 @@
+// This is an open source non-commercial project. Dear PVS-Studio, please check
+// it. PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
+
 // spellfile.c: code for reading and writing spell files.
 //
 // See spell.c for information about spell checking.
diff --git a/src/nvim/state.c b/src/nvim/state.c
index 44c6441e40..210708c3f4 100644
--- a/src/nvim/state.c
+++ b/src/nvim/state.c
@@ -1,3 +1,6 @@
+// This is an open source non-commercial project. Dear PVS-Studio, please check
+// it. PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
+
 #include <assert.h>
 
 #include "nvim/lib/kvec.h"
diff --git a/src/nvim/strings.c b/src/nvim/strings.c
index 8a1a3beddd..743b43c2e5 100644
--- a/src/nvim/strings.c
+++ b/src/nvim/strings.c
@@ -1,3 +1,6 @@
+// This is an open source non-commercial project. Dear PVS-Studio, please check
+// it. PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
+
 #include <inttypes.h>
 #include <stdarg.h>
 #include <stdbool.h>
diff --git a/src/nvim/syntax.c b/src/nvim/syntax.c
index d5ff3707e8..ce48547163 100644
--- a/src/nvim/syntax.c
+++ b/src/nvim/syntax.c
@@ -1,3 +1,6 @@
+// This is an open source non-commercial project. Dear PVS-Studio, please check
+// it. PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
+
 /*
  * syntax.c: code for syntax highlighting
  */
diff --git a/src/nvim/tag.c b/src/nvim/tag.c
index 0c7244cbb3..b8b86bf979 100644
--- a/src/nvim/tag.c
+++ b/src/nvim/tag.c
@@ -1,3 +1,6 @@
+// This is an open source non-commercial project. Dear PVS-Studio, please check
+// it. PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
+
 /*
  * Code to handle tags and the tag stack
  */
diff --git a/src/nvim/terminal.c b/src/nvim/terminal.c
index 85c4950b42..19b9bdc19f 100644
--- a/src/nvim/terminal.c
+++ b/src/nvim/terminal.c
@@ -1,3 +1,6 @@
+// This is an open source non-commercial project. Dear PVS-Studio, please check
+// it. PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
+
 // VT220/xterm-like terminal emulator.
 // Powered by libvterm http://www.leonerd.org.uk/code/libvterm
 //
diff --git a/src/nvim/testdir/samples/memfile_test.c b/src/nvim/testdir/samples/memfile_test.c
index 0fa1e14c40..3c8f108255 100644
--- a/src/nvim/testdir/samples/memfile_test.c
+++ b/src/nvim/testdir/samples/memfile_test.c
@@ -1,3 +1,6 @@
+// This is an open source non-commercial project. Dear PVS-Studio, please check
+// it. PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
+
 /* vi:set ts=8 sts=4 sw=4 noet:
  *
  * VIM - Vi IMproved	by Bram Moolenaar
diff --git a/src/nvim/tui/input.c b/src/nvim/tui/input.c
index 8e5adb14f9..3f2ccd4746 100644
--- a/src/nvim/tui/input.c
+++ b/src/nvim/tui/input.c
@@ -1,3 +1,6 @@
+// This is an open source non-commercial project. Dear PVS-Studio, please check
+// it. PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
+
 
 #include "nvim/tui/input.h"
 #include "nvim/vim.h"
diff --git a/src/nvim/tui/tui.c b/src/nvim/tui/tui.c
index f34f5f1bc4..941fdb2570 100644
--- a/src/nvim/tui/tui.c
+++ b/src/nvim/tui/tui.c
@@ -1,3 +1,6 @@
+// This is an open source non-commercial project. Dear PVS-Studio, please check
+// it. PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
+
 // Terminal UI functions. Invoked (by ui_bridge.c) on the TUI thread.
 
 #include <assert.h>
diff --git a/src/nvim/ugrid.c b/src/nvim/ugrid.c
index 127b18feb6..7a0a16687e 100644
--- a/src/nvim/ugrid.c
+++ b/src/nvim/ugrid.c
@@ -1,3 +1,6 @@
+// This is an open source non-commercial project. Dear PVS-Studio, please check
+// it. PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
+
 #include <assert.h>
 #include <stdbool.h>
 #include <stdio.h>
diff --git a/src/nvim/ui.c b/src/nvim/ui.c
index 28f71b7ef2..cfa186987c 100644
--- a/src/nvim/ui.c
+++ b/src/nvim/ui.c
@@ -1,3 +1,6 @@
+// This is an open source non-commercial project. Dear PVS-Studio, please check
+// it. PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
+
 #include <assert.h>
 #include <inttypes.h>
 #include <stdbool.h>
diff --git a/src/nvim/ui_bridge.c b/src/nvim/ui_bridge.c
index 9f780663ac..2c70b46c14 100644
--- a/src/nvim/ui_bridge.c
+++ b/src/nvim/ui_bridge.c
@@ -1,3 +1,6 @@
+// This is an open source non-commercial project. Dear PVS-Studio, please check
+// it. PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
+
 // UI wrapper that sends requests to the UI thread.
 // Used by the built-in TUI and libnvim-based UIs.
 
diff --git a/src/nvim/undo.c b/src/nvim/undo.c
index 571ad7204f..290d5d7553 100644
--- a/src/nvim/undo.c
+++ b/src/nvim/undo.c
@@ -1,3 +1,6 @@
+// This is an open source non-commercial project. Dear PVS-Studio, please check
+// it. PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
+
 /*
  * undo.c: multi level undo facility
  *
diff --git a/src/nvim/version.c b/src/nvim/version.c
index 9a5d7ce169..29ce741ba0 100644
--- a/src/nvim/version.c
+++ b/src/nvim/version.c
@@ -1,3 +1,6 @@
+// This is an open source non-commercial project. Dear PVS-Studio, please check
+// it. PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
+
 /// @file version.c
 ///
 /// Nvim was forked from Vim 7.4.160.
diff --git a/src/nvim/window.c b/src/nvim/window.c
index 6020159af9..60bba19b07 100644
--- a/src/nvim/window.c
+++ b/src/nvim/window.c
@@ -1,3 +1,6 @@
+// This is an open source non-commercial project. Dear PVS-Studio, please check
+// it. PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
+
 #include <assert.h>
 #include <inttypes.h>
 #include <stdbool.h>
diff --git a/test/functional/fixtures/printargs-test.c b/test/functional/fixtures/printargs-test.c
index 2c25cf8447..be54605817 100644
--- a/test/functional/fixtures/printargs-test.c
+++ b/test/functional/fixtures/printargs-test.c
@@ -1,3 +1,6 @@
+// This is an open source non-commercial project. Dear PVS-Studio, please check
+// it. PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
+
 #include <stdio.h>
 
 int main(int argc, char **argv)
diff --git a/test/functional/fixtures/shell-test.c b/test/functional/fixtures/shell-test.c
index 3f3976ece5..8dbec2aaee 100644
--- a/test/functional/fixtures/shell-test.c
+++ b/test/functional/fixtures/shell-test.c
@@ -1,3 +1,6 @@
+// This is an open source non-commercial project. Dear PVS-Studio, please check
+// it. PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
+
 #include <stdio.h>
 #include <string.h>
 #include <stdint.h>
diff --git a/test/functional/fixtures/tty-test.c b/test/functional/fixtures/tty-test.c
index 778e7f3cd3..3406b3a202 100644
--- a/test/functional/fixtures/tty-test.c
+++ b/test/functional/fixtures/tty-test.c
@@ -1,3 +1,6 @@
+// This is an open source non-commercial project. Dear PVS-Studio, please check
+// it. PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
+
 #include <stdbool.h>
 #include <stdio.h>
 #include <stdlib.h>
diff --git a/test/unit/fixtures/multiqueue.c b/test/unit/fixtures/multiqueue.c
index da63e55919..a8dca0a844 100644
--- a/test/unit/fixtures/multiqueue.c
+++ b/test/unit/fixtures/multiqueue.c
@@ -1,3 +1,6 @@
+// This is an open source non-commercial project. Dear PVS-Studio, please check
+// it. PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
+
 #include <string.h>
 #include <stdlib.h>
 #include "nvim/event/multiqueue.h"
diff --git a/test/unit/fixtures/rbuffer.c b/test/unit/fixtures/rbuffer.c
index d587d6b054..3f4062fa18 100644
--- a/test/unit/fixtures/rbuffer.c
+++ b/test/unit/fixtures/rbuffer.c
@@ -1,3 +1,6 @@
+// This is an open source non-commercial project. Dear PVS-Studio, please check
+// it. PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
+
 #include "nvim/rbuffer.h"
 #include "rbuffer.h"