1 files changed, 2 insertions, 1 deletions
diff --git a/synapse/handlers/room_member.py b/synapse/handlers/room_member.py
index 918eb203e2..eddc2af9ba 100644
--- a/synapse/handlers/room_member.py
+++ b/synapse/handlers/room_member.py
@@ -1260,7 +1260,8 @@ class RoomMemberHandler(metaclass=abc.ABCMeta):
         # Add new room to the room directory if the old room was there
         # Remove old room from the room directory
         old_room = await self.store.get_room(old_room_id)
-        if old_room is not None and old_room["is_public"]:
+        # If the old room exists and is public.
+        if old_room is not None and old_room[0]:
             await self.store.set_room_is_public(old_room_id, False)
             await self.store.set_room_is_public(room_id, True)