diff --git a/lib/nerdtree/bookmark.vim b/lib/nerdtree/bookmark.vim
index f8606ee..d7b9d3d 100644
--- a/lib/nerdtree/bookmark.vim
+++ b/lib/nerdtree/bookmark.vim
@@ -293,15 +293,17 @@ function! s:Bookmark.str()
 endfunction
 
 " FUNCTION: Bookmark.toRoot(nerdtree) {{{1
-" Make the node for this bookmark the new tree root
+" Set the root of the given NERDTree to the node for this Bookmark. If a node
+" for this Bookmark does not exist, a new one is initialized.
 function! s:Bookmark.toRoot(nerdtree)
     if self.validate()
         try
-            let targetNode = self.getNode(a:nerdtree, 1)
+            let l:targetNode = self.getNode(a:nerdtree, 1)
+            call l:targetNode.closeChildren()
         catch /^NERDTree.BookmarkedNodeNotFoundError/
-            let targetNode = g:NERDTreeFileNode.New(s:Bookmark.BookmarkFor(self.name).path, a:nerdtree)
+            let l:targetNode = g:NERDTreeFileNode.New(s:Bookmark.BookmarkFor(self.name).path, a:nerdtree)
         endtry
-        call a:nerdtree.changeRoot(targetNode)
+        call a:nerdtree.changeRoot(l:targetNode)
     endif
 endfunction