diff --git a/util/http.py b/util/http.py
index bb43bd7f8..764a8e01d 100644
--- a/util/http.py
+++ b/util/http.py
@@ -28,5 +28,5 @@ def abort(status_code, message=None, **kwargs):
   logger.error('Error %s: %s. Arguments: %s' % (status_code, message, request.view_args))
 
   # Report the abort to the user.
-  flask_abort(make_response(HTTPException(message), status_code, headers))
+  flask_abort(make_response(HTTPException(message), status_code, {}))