diff --git a/plugin/jsbeautify.vim b/plugin/jsbeautify.vim
index 2512aa1..f2e7134 100644
--- a/plugin/jsbeautify.vim
+++ b/plugin/jsbeautify.vim
@@ -620,4 +620,7 @@ function! g:Jsbeautify()
 	:put!0
 endfunction
 
-nnoremap <silent> <leader>ff :call g:Jsbeautify()<cr>
+if !hasmapto(':Jsbeautify')
+	nnoremap <silent> <leader>ff :call g:Jsbeautify()<cr>
+endif
+