diff --git a/synapse/handlers/federation.py b/synapse/handlers/federation.py

index 5728ea2ee7..5ca410e2b3 100644
--- a/synapse/handlers/federation.py
+++ b/synapse/handlers/federation.py
@@ -1110,7 +1110,7 @@ class FederationHandler(BaseHandler):
         Logs a warning if we can't find the given event.
         """
 
-        room_version = await self.store.get_room_version_id(room_id)
+        room_version = await self.store.get_room_version(room_id)
 
         event_infos = []
 
@@ -1916,11 +1916,7 @@ class FederationHandler(BaseHandler):
 
         for e_id in missing_auth_events:
             m_ev = await self.federation_client.get_pdu(
-                [origin],
-                e_id,
-                room_version=room_version.identifier,
-                outlier=True,
-                timeout=10000,
+                [origin], e_id, room_version=room_version, outlier=True, timeout=10000,
             )
             if m_ev and m_ev.event_id == e_id:
                 event_map[e_id] = m_ev