diff --git a/src/nvim/option_defs.h b/src/nvim/option_defs.h
index f9cddf5550..0f86b17176 100644
--- a/src/nvim/option_defs.h
+++ b/src/nvim/option_defs.h
@@ -21,13 +21,14 @@
 #define SREQ_WIN 1     // Request window-local option value
 #define SREQ_BUF 2     // Request buffer-local option value
 
-/*
- * Default values for 'errorformat'.
- * The "%f|%l| %m" one is used for when the contents of the quickfix window is
- * written to a file.
- */
-#define DFLT_EFM \
-  "%*[^\"]\"%f\"%*\\D%l: %m,\"%f\"%*\\D%l: %m,%-G%f:%l: (Each undeclared identifier is reported only once,%-G%f:%l: for each function it appears in.),%-GIn file included from %f:%l:%c:,%-GIn file included from %f:%l:%c\\,,%-GIn file included from %f:%l:%c,%-GIn file included from %f:%l,%-G%*[ ]from %f:%l:%c,%-G%*[ ]from %f:%l:,%-G%*[ ]from %f:%l\\,,%-G%*[ ]from %f:%l,%f:%l:%c:%m,%f(%l):%m,%f:%l:%m,\"%f\"\\, line %l%*\\D%c%*[^ ] %m,%D%*\\a[%*\\d]: Entering directory %*[`']%f',%X%*\\a[%*\\d]: Leaving directory %*[`']%f',%D%*\\a: Entering directory %*[`']%f',%X%*\\a: Leaving directory %*[`']%f',%DMaking %*\\a in %f,%f|%l| %m"
+// Default values for 'errorformat'.
+// The "%f|%l| %m" one is used for when the contents of the quickfix window is
+// written to a file.
+#ifdef WIN32
+# define DFLT_EFM "%f(%l) \\=: %t%*\\D%n: %m,%*[^\"]\"%f\"%*\\D%l: %m,%f(%l) \\=: %m,%*[^ ] %f %l: %m,%f:%l:%c:%m,%f(%l):%m,%f:%l:%m,%f|%l| %m"
+#else
+# define DFLT_EFM "%*[^\"]\"%f\"%*\\D%l: %m,\"%f\"%*\\D%l: %m,%-G%f:%l: (Each undeclared identifier is reported only once,%-G%f:%l: for each function it appears in.),%-GIn file included from %f:%l:%c:,%-GIn file included from %f:%l:%c\\,,%-GIn file included from %f:%l:%c,%-GIn file included from %f:%l,%-G%*[ ]from %f:%l:%c,%-G%*[ ]from %f:%l:,%-G%*[ ]from %f:%l\\,,%-G%*[ ]from %f:%l,%f:%l:%c:%m,%f(%l):%m,%f:%l:%m,\"%f\"\\, line %l%*\\D%c%*[^ ] %m,%D%*\\a[%*\\d]: Entering directory %*[`']%f',%X%*\\a[%*\\d]: Leaving directory %*[`']%f',%D%*\\a: Entering directory %*[`']%f',%X%*\\a: Leaving directory %*[`']%f',%DMaking %*\\a in %f,%f|%l| %m"
+#endif
 
 #define DFLT_GREPFORMAT "%f:%l:%m,%f:%l%m,%f  %l%m"