diff --git a/js/h5p.js b/js/h5p.js
index 4183e1c..932477e 100644
--- a/js/h5p.js
+++ b/js/h5p.js
@@ -459,7 +459,8 @@ H5P.getPath = function (path, contentId) {
   }
 
   if (!hasProtocol(prefix)) {
-    prefix = window.parent.location.protocol + "//" + window.parent.location.host + prefix;
+    // Use absolute urls
+    prefix = window.location.protocol + "//" + window.location.host + prefix;
   }
 
   return prefix + '/' + path;