diff --git a/ftdetect/ats.vim b/ftdetect/ats.vim
index eb3b4a5..252884e 100644
--- a/ftdetect/ats.vim
+++ b/ftdetect/ats.vim
@@ -1,2 +1,4 @@
-autocmd BufNewFile,BufRead *.lats,*.ats,*.dats*,*.sats,*.hats set filetype=ats
-autocmd BufNewFile,BufRead *.cats set filetype=c
+augroup ats
+    autocmd BufNewFile,BufRead *.lats,*.ats,*.dats*,*.sats,*.hats set filetype=ats
+    autocmd BufNewFile,BufRead *.cats set filetype=c
+augroup END