diff --git a/core/public/javascripts/refinery/admin.js b/core/public/javascripts/refinery/admin.js
index 28a7ab8c6f..2cd0016a4c 100644
--- a/core/public/javascripts/refinery/admin.js
+++ b/core/public/javascripts/refinery/admin.js
@@ -1132,5 +1132,5 @@ parseURL = function(url)
 };
 
 iframed = function() {
-  return (parent && parent.document.location.href != document.location.href && $.isFunction(parent.$));
+  return (parent && parent.document && parent.document.location.href != document.location.href && $.isFunction(parent.$));
 };