diff --git a/scripts/modules/request.js b/scripts/modules/request.js
index 31a7a4a1f8..48c9913bd6 100644
--- a/scripts/modules/request.js
+++ b/scripts/modules/request.js
@@ -39,10 +39,11 @@ module.exports = {
                 if (error) {
                     response = { statusCode: httpRequest.status };
                 }
-                callback(error, response, optionalCallbackParameter);
 
                 // Break circular reference to httpRequest so the engine can garbage collect it.
                 httpRequest.onreadystatechange = null;
+
+                callback(error, response, optionalCallbackParameter);
             }
         };
         if (typeof options === 'string') {