diff --git a/lib/nerdtree/creator.vim b/lib/nerdtree/creator.vim
index d76452c..b1a617f 100644
--- a/lib/nerdtree/creator.vim
+++ b/lib/nerdtree/creator.vim
@@ -8,7 +8,7 @@ let g:NERDTreeCreator = s:Creator
 "FUNCTION: s:Creator._bindMappings() {{{1
 function! s:Creator._bindMappings()
     "make <cr> do the same as the activate node mapping
-    exec "nnoremap <silent> <buffer> <cr> :call nerdtree#invokeKeyMap(g:NERDTreeMapActivateNode)<cr>"
+    nnoremap <silent> <buffer> <cr> :call nerdtree#invokeKeyMap(g:NERDTreeMapActivateNode)<cr>
 
     call g:NERDTreeKeyMap.BindAll()