diff --git a/imp/js/imp.js b/imp/js/imp.js
index b4fe3c1c441..70a70c20343 100644
--- a/imp/js/imp.js
+++ b/imp/js/imp.js
@@ -172,7 +172,7 @@ var IMP_JS = {
 
         resize = function() {
             if (!(--count)) {
-                this.iframeResize(iframe);
+                this.iframeResize(null, iframe);
             }
         }.bind(this);