diff --git a/plugin/NERD_tree.vim b/plugin/NERD_tree.vim
index 0f172f0..e05c39a 100644
--- a/plugin/NERD_tree.vim
+++ b/plugin/NERD_tree.vim
@@ -308,6 +308,7 @@ function! s:oTreeFileNode.MakeRoot() dict
     if self.path.isDirectory
         let t:NERDTreeRoot = self
     else
+        call self.CacheParent()
         let t:NERDTreeRoot = self.parent
     endif