diff --git a/plugin/NERD_tree.vim b/plugin/NERD_tree.vim
index fe58d71..e3f723f 100644
--- a/plugin/NERD_tree.vim
+++ b/plugin/NERD_tree.vim
@@ -1369,6 +1369,7 @@ endfunction
 function! s:oPath.Refresh() dict
     call self.ReadInfoFromDisk(self.StrForOS(0))
     call self.CacheBookmarks()
+    let self.cachedDisplayString = ""
 endfunction
 
 "FUNCTION: oPath.Rename() {{{3