diff --git a/plugin/NERD_tree.vim b/plugin/NERD_tree.vim
index cc23e79..f04771c 100644
--- a/plugin/NERD_tree.vim
+++ b/plugin/NERD_tree.vim
@@ -2308,7 +2308,7 @@ function! s:OpenFileNode(treenode)
     call s:PutCursorInTreeWin()
 
     "if the file is already open in this tab then just stick the cursor in it
-    let winnr = bufwinnr(a:treenode.path.StrForOS(0))
+    let winnr = bufwinnr('^' . a:treenode.path.StrForOS(0) . '$')
     if winnr != -1
         exec winnr . "wincmd w"