1 files changed, 3 insertions, 1 deletions
diff --git a/synapse/handlers/room_member.py b/synapse/handlers/room_member.py
index 44c5e3239c..91bb34cd55 100644
--- a/synapse/handlers/room_member.py
+++ b/synapse/handlers/room_member.py
@@ -370,7 +370,9 @@ class RoomMemberHandler(object):
             if block_invite:
                 raise SynapseError(403, "Invites have been disabled on this server")
 
-        prev_events_and_hashes = yield self.store.get_prev_events_for_room(room_id)
+        prev_events_and_hashes = yield self.store.get_prev_events_and_hashes_for_room(
+            room_id
+        )
         latest_event_ids = (event_id for (event_id, _, _) in prev_events_and_hashes)
 
         current_state_ids = yield self.state_handler.get_current_state_ids(