diff --git a/vim/checklist.vim b/vim/checklist.vim
index 52f1750..2179e2d 100644
--- a/vim/checklist.vim
+++ b/vim/checklist.vim
@@ -14,4 +14,4 @@ function! Flip_box ()
     s!\[xXx\]![x]!eg
 endfunction
 
-
+set filetype=markdown