diff --git a/lib/nerdtree/tree_dir_node.vim b/lib/nerdtree/tree_dir_node.vim
index 4a6d213..62bcf88 100644
--- a/lib/nerdtree/tree_dir_node.vim
+++ b/lib/nerdtree/tree_dir_node.vim
@@ -243,7 +243,7 @@ function! s:TreeDirNode._glob(pattern, all)
         let l:pathSpec = fnamemodify(self.path.str({'format': 'Glob'}), ':.')
 
         " On Windows, the drive letter may be removed by "fnamemodify()".
-        if nerdtree#runningWindows() && l:pathSpec[0] == '\'
+        if nerdtree#runningWindows() && l:pathSpec[0] == g:NERDTreePath.Slash()
             let l:pathSpec = self.path.drive . l:pathSpec
         endif
     endif