diff --git a/static/js/graphing.js b/static/js/graphing.js
index 5058c32eb..290c9f2ad 100644
--- a/static/js/graphing.js
+++ b/static/js/graphing.js
@@ -566,7 +566,6 @@ ImageHistoryTree.prototype.update_ = function(source) {
 
   // Translate the foreign object so the tags are under the ID.
   fo.attr("transform", function(d, i) {
-    bbox = this.getBBox()
     return "translate(" + [-130, 0 ] + ")";
   });