diff --git a/notebook/static/base/js/namespace.js b/notebook/static/base/js/namespace.js
index b86fa39dc..20c1f3f52 100644
--- a/notebook/static/base/js/namespace.js
+++ b/notebook/static/base/js/namespace.js
@@ -70,6 +70,7 @@ define(function(){
     jglobal('MainToolBar','notebook/js/maintoolbar');
     jglobal('NotebookNotificationArea','notebook/js/notificationarea');
     jglobal('NotebookTour', 'notebook/js/tour');
+    jglobal('MenuBar', 'notebook/js/menubar');
 
     // tree
     jglobal('SessionList','tree/js/sessionlist');
diff --git a/notebook/static/notebook/js/menubar.js b/notebook/static/notebook/js/menubar.js
index 56f1099c9..02ffcd318 100644
--- a/notebook/static/notebook/js/menubar.js
+++ b/notebook/static/notebook/js/menubar.js
@@ -16,7 +16,7 @@ define([
         /**
          * Constructor
          *
-         * A MenuBar Class to generate the menubar of IPython notebook
+         * A MenuBar Class to generate the menubar of Jupyter notebook
          *
          * Parameters:
          *  selector: string
@@ -414,8 +414,5 @@ define([
         
     };
 
-    // Backwards compatability.
-    IPython.MenuBar = MenuBar;
-
     return {'MenuBar': MenuBar};
 });