diff --git a/vim/vimrc b/vim/vimrc
index 3a0172a..041bca2 100644
--- a/vim/vimrc
+++ b/vim/vimrc
@@ -449,7 +449,7 @@ endif
 au FileType markdown set comments+=fb:- comments-=b:- indentexpr=
 
 " ASM options
-au BufEnter *.asm,*.s,*.inc,*.i call _agw.setup_asm()
+au BufEnter *\.asm,*\.s,*\.inc,*\.i call _agw.setup_asm()
 
 " close empty buffers automatically
 au BufEnter * call _agw.close_empty()