diff --git a/runtime/filetype.vim b/runtime/filetype.vim
index 1adb4038b..5301877e7 100644
--- a/runtime/filetype.vim
+++ b/runtime/filetype.vim
@@ -342,7 +342,7 @@ au BufNewFile,BufRead *.capnp			setf capnp
 au BufNewFile,BufRead cgdbrc			setf cgdbrc
 
 " C#
-au BufNewFile,BufRead *.cs,*.csx		setf cs
+au BufNewFile,BufRead *.cs,*.csx,*.cake		setf cs
 
 " CSDL
 au BufNewFile,BufRead *.csdl			setf csdl
diff --git a/src/testdir/test_filetype.vim b/src/testdir/test_filetype.vim
index 66942b90c..6f43df51b 100644
--- a/src/testdir/test_filetype.vim
+++ b/src/testdir/test_filetype.vim
@@ -196,7 +196,7 @@ def s:GetFilenameChecks(): dict<list<string>>
     crm: ['file.crm'],
     crontab: ['crontab', 'crontab.file', '/etc/cron.d/file', 'any/etc/cron.d/file'],
     crystal: ['file.cr'],
-    cs: ['file.cs', 'file.csx'],
+    cs: ['file.cs', 'file.csx', 'file.cake'],
     csc: ['file.csc'],
     csdl: ['file.csdl'],
     csp: ['file.csp', 'file.fdr'],