diff --git a/plugin/NERD_commenter.vim b/plugin/NERD_commenter.vim
index d84aa70..651d82f 100644
--- a/plugin/NERD_commenter.vim
+++ b/plugin/NERD_commenter.vim
@@ -441,7 +441,7 @@ function s:SetUpForNewFiletype(filetype, forceReset)
 endfunction
 
 function s:CreateDelimMapFromCms()
-    if exists('g:NERDDefaultDelims')
+    if &ft == '' && exists('g:NERDDefaultDelims')
         let delims = g:NERDDefaultDelims
         for i in ['left', 'leftAlt', 'right', 'rightAlt']
             if !has_key(delims, i)