diff --git a/viml_conf/plugins.vim b/viml_conf/plugins.vim
index da3252e..f7c202b 100644
--- a/viml_conf/plugins.vim
+++ b/viml_conf/plugins.vim
@@ -119,8 +119,9 @@ if g:is_win || g:is_mac
   let g:netrw_nogx = 1
 
   " Use another mapping for the open URL method
-  nmap ob <Plug>(openbrowser-smart-search)
-  xmap ob <Plug>(openbrowser-smart-search)
+  nmap <leader>ob <Plug>(openbrowser-smart-search)
+  xmap <leader>ob <Plug>(openbrowser-smart-search)
+  nmap ob <cmd>echoerr "Use <leader>ob instead!"<CR>
 endif
 
 """"""""""""""""""""""""""" vista settings """"""""""""""""""""""""""""""""""