diff --git a/ftdetect/ats.vim b/ftdetect/ats.vim
index 07fa8ee..eb3b4a5 100644
--- a/ftdetect/ats.vim
+++ b/ftdetect/ats.vim
@@ -1 +1,2 @@
-autocmd BufNewFile,BufRead *.lats,*.ats,*.dats*,*.sats,*.cats,*.hats set filetype=ats
+autocmd BufNewFile,BufRead *.lats,*.ats,*.dats*,*.sats,*.hats set filetype=ats
+autocmd BufNewFile,BufRead *.cats set filetype=c