diff --git a/runtime/lua/vim/filetype.lua b/runtime/lua/vim/filetype.lua
index 02c0a83bf9..ded5fbaa38 100644
--- a/runtime/lua/vim/filetype.lua
+++ b/runtime/lua/vim/filetype.lua
@@ -472,6 +472,7 @@ local extension = {
   fwt = 'fan',
   lib = 'faust',
   fnl = 'fennel',
+  fnml = 'fennel',
   fga = 'fga',
   m4gl = 'fgl',
   ['4gl'] = 'fgl',
diff --git a/test/old/testdir/test_filetype.vim b/test/old/testdir/test_filetype.vim
index 5112089f73..ada3a3f8ed 100644
--- a/test/old/testdir/test_filetype.vim
+++ b/test/old/testdir/test_filetype.vim
@@ -292,7 +292,7 @@ func s:GetFilenameChecks() abort
     \ 'falcon': ['file.fal'],
     \ 'fan': ['file.fan', 'file.fwt'],
     \ 'faust': ['file.dsp', 'file.lib'],
-    \ 'fennel': ['file.fnl', '.fennelrc', 'fennelrc'],
+    \ 'fennel': ['file.fnl', '.fennelrc', 'fennelrc', 'file.fnml'],
     \ 'fetchmail': ['.fetchmailrc'],
     \ 'fga': ['file.fga'],
     \ 'fgl': ['file.4gl', 'file.4gh', 'file.m4gl'],