diff --git a/synapse/federation/transport/server.py b/synapse/federation/transport/server.py
index d8cf9ed299f6..d53a9c9d75d0 100644
--- a/synapse/federation/transport/server.py
+++ b/synapse/federation/transport/server.py
@@ -971,7 +971,7 @@ async def on_POST(self, origin, content, query, group_id, room_id, config_key):
         if get_domain_from_id(requester_user_id) != origin:
             raise SynapseError(403, "requester_user_id doesn't match origin")
 
-        result = await self.groups_handler.update_room_in_group(
+        result = await self.handler.update_room_in_group(
             group_id, requester_user_id, room_id, config_key, content
         )