diff --git a/IPython/html/static/widgets/js/widget_selectioncontainer.js b/IPython/html/static/widgets/js/widget_selectioncontainer.js
index 25b09cf..a9bcfa2 100644
--- a/IPython/html/static/widgets/js/widget_selectioncontainer.js
+++ b/IPython/html/static/widgets/js/widget_selectioncontainer.js
@@ -34,7 +34,6 @@ define([
             this.model.on('change:_titles', function(model, value, options) {
                 this.update_titles(value);
             }, this);
-            var that = this;
             this.on('displayed', function() {
                 this.update_titles();
             }, this);