diff --git a/synapse/storage/roommember.py b/synapse/storage/roommember.py
index 37c0723eb6..ed7d936b3d 100644
--- a/synapse/storage/roommember.py
+++ b/synapse/storage/roommember.py
@@ -16,7 +16,6 @@
 
 import logging
 from collections import namedtuple
-from typing import Iterable
 
 from six import iteritems, itervalues