diff --git a/synapse/storage/roommember.py b/synapse/storage/roommember.py
index e1777d7af..4e0e9ab59 100644
--- a/synapse/storage/roommember.py
+++ b/synapse/storage/roommember.py
@@ -121,7 +121,7 @@ class RoomMemberStore(SQLBaseStore):
         return self.get_rooms_for_user_where_membership_is(
             user_id, [Membership.INVITE]
         ).addCallback(lambda invites: self._get_events([
-            invites.event_id for invite in invites
+            invite.event_id for invite in invites
         ]))
 
     def get_leave_and_ban_events_for_user(self, user_id):