diff --git a/endpoints/common.py b/endpoints/common.py
index 2648f5e9c..ec4727edb 100644
--- a/endpoints/common.py
+++ b/endpoints/common.py
@@ -2,7 +2,7 @@ import logging
 import os
 import base64
 
-from flask import request, abort, session
+from flask import request, abort, session, make_response
 from flask.ext.login import login_user, UserMixin
 from flask.ext.principal import identity_changed