diff --git a/IPython/html/static/notebook/js/widget.js b/IPython/html/static/notebook/js/widget.js
index a24d29276..37aa3d87c 100644
--- a/IPython/html/static/notebook/js/widget.js
+++ b/IPython/html/static/notebook/js/widget.js
@@ -466,7 +466,7 @@ define(["components/underscore/underscore-min",
         
         initialize: function() {
             this.visible = true;
-            this.model.on('change',this.update,this);
+            this.model.on('sync',this.update,this);
         },
         
         add_class: function(selector, class_list){