diff --git a/user/module.js b/user/module.js
index 01ed0168d0d..324a2af2de6 100644
--- a/user/module.js
+++ b/user/module.js
@@ -35,7 +35,7 @@ M.core_user.init_participation = function(Y) {
 
 M.core_user.init_tree = function(Y, expand_all, htmlid) {
     Y.use('yui2-treeview', function(Y) {
-        var tree = new YAHOO.widget.TreeView(htmlid);
+        var tree = new Y.YUI2.widget.TreeView(htmlid);
 
         tree.subscribe("clickEvent", function(node, event) {
             // we want normal clicking which redirects to url