diff --git a/plugin/NERD_tree.vim b/plugin/NERD_tree.vim
index 85bb4cf..1135c65 100644
--- a/plugin/NERD_tree.vim
+++ b/plugin/NERD_tree.vim
@@ -1797,9 +1797,9 @@ function! s:Path.cacheDisplayString()
 endfunction
 "FUNCTION: Path.changeToDir() {{{3
 function! s:Path.changeToDir()
-    let dir = self.strForCd()
+    let dir = self.str({'format': 'Cd'})
     if self.isDirectory ==# 0
-        let dir = self.getParent().strForCd()
+        let dir = self.getParent().str({'format': 'Cd'})
     endif
 
     try
@@ -2428,7 +2428,7 @@ function! s:initNerdTree(name)
     "if instructed to, then change the vim CWD to the dir the NERDTree is
     "inited in
     if g:NERDTreeChDirMode != 0
-        exec 'cd ' . path.strForCd()
+        call path.changeToDir()
     endif
 
     if s:treeExistsForTab()
@@ -3927,7 +3927,7 @@ function! s:upDir(keepState)
         endif
 
         if g:NERDTreeChDirMode ==# 2
-            exec 'cd ' . b:NERDTreeRoot.path.strForCd()
+            call b:NERDTreeRoot.path.changeToDir()
         endif
 
         call s:renderView()