diff --git a/static/js/graphing.js b/static/js/graphing.js
index 3ab543f65..4fa8e7f9c 100644
--- a/static/js/graphing.js
+++ b/static/js/graphing.js
@@ -901,7 +901,7 @@ ImageHistoryTree.prototype.toggle_ = function(d) {
 ImageHistoryTree.prototype.dispose = function() {
   var container =  this.container_ ;
   $('#' + container).removeOverscroll();
-  $('#' + container).html();
+  $('#' + container).html('');
 };
 
 ////////////////////////////////////////////////////////////////////////////////