diff --git a/autoload/nerdtree.vim b/autoload/nerdtree.vim
index b0eb103..e0d86ef 100644
--- a/autoload/nerdtree.vim
+++ b/autoload/nerdtree.vim
@@ -37,6 +37,7 @@ function! s:reuseWin(dir) abort
         endif
 
         if nt.isWinTree() && nt.root.path.equals(path)
+            call nt.setPreviousBuf(bufnr("#"))
             exec "buffer " . i
             return 1
         endif
diff --git a/lib/nerdtree/nerdtree.vim b/lib/nerdtree/nerdtree.vim
index 73a30f7..1404cee 100644
--- a/lib/nerdtree/nerdtree.vim
+++ b/lib/nerdtree/nerdtree.vim
@@ -186,6 +186,10 @@ function! s:NERDTree.previousBuf()
     return self._previousBuf
 endfunction
 
+function! s:NERDTree.setPreviousBuf(bnum)
+    let self._previousBuf = a:bnum
+endfunction
+
 "FUNCTION: s:NERDTree.render() {{{1
 "A convenience function - since this is called often
 function! s:NERDTree.render()