diff --git a/runtime/lua/vim/filetype.lua b/runtime/lua/vim/filetype.lua
index 7ab01402cc..5b5c9e0af5 100644
--- a/runtime/lua/vim/filetype.lua
+++ b/runtime/lua/vim/filetype.lua
@@ -1321,6 +1321,7 @@ local filename = {
   ['.gnashpluginrc'] = 'gnash',
   gnashpluginrc = 'gnash',
   gnashrc = 'gnash',
+  ['.gnuplot_history'] = 'gnuplot',
   ['go.sum'] = 'gosum',
   ['go.work.sum'] = 'gosum',
   ['go.work'] = 'gowork',
diff --git a/test/old/testdir/test_filetype.vim b/test/old/testdir/test_filetype.vim
index 7d4c8e7318..ea37b44b78 100644
--- a/test/old/testdir/test_filetype.vim
+++ b/test/old/testdir/test_filetype.vim
@@ -273,7 +273,7 @@ func s:GetFilenameChecks() abort
     \ 'glsl': ['file.glsl'],
     \ 'gn': ['file.gn', 'file.gni'],
     \ 'gnash': ['gnashrc', '.gnashrc', 'gnashpluginrc', '.gnashpluginrc'],
-    \ 'gnuplot': ['file.gpi', '.gnuplot', 'file.gnuplot'],
+    \ 'gnuplot': ['file.gpi', '.gnuplot', 'file.gnuplot', '.gnuplot_history'],
     \ 'go': ['file.go'],
     \ 'gomod': ['go.mod'],
     \ 'gosum': ['go.sum', 'go.work.sum'],