1 files changed, 3 insertions, 1 deletions
diff --git a/synapse/storage/databases/main/event_federation.py b/synapse/storage/databases/main/event_federation.py
index 2e07c37340..ebffd89251 100644
--- a/synapse/storage/databases/main/event_federation.py
+++ b/synapse/storage/databases/main/event_federation.py
@@ -137,7 +137,9 @@ class EventFederationWorkerStore(EventsWorkerStore, SignatureWorkerStore, SQLBas
 
         return list(results)
 
-    async def get_auth_chain_difference(self, state_sets: List[Set[str]]) -> Set[str]:
+    async def get_auth_chain_difference(
+        self, room_id: str, state_sets: List[Set[str]]
+    ) -> Set[str]:
         """Given sets of state events figure out the auth chain difference (as
         per state res v2 algorithm).