1 files changed, 2 insertions, 0 deletions
diff --git a/synapse/storage/roommember.py b/synapse/storage/roommember.py
index 839c74f63a..3691eade05 100644
--- a/synapse/storage/roommember.py
+++ b/synapse/storage/roommember.py
@@ -66,6 +66,7 @@ class RoomMemberStore(SQLBaseStore):
 
         txn.call_after(self.get_rooms_for_user.invalidate, target_user_id)
         txn.call_after(self.get_joined_hosts_for_room.invalidate, event.room_id)
+        txn.call_after(self.get_users_in_room.invalidate, event.room_id)
 
     def get_room_member(self, user_id, room_id):
         """Retrieve the current state of a room member.
@@ -87,6 +88,7 @@ class RoomMemberStore(SQLBaseStore):
 
         return self.runInteraction("get_room_member", f)
 
+    @cached()
     def get_users_in_room(self, room_id):
         def f(txn):