diff --git a/synapse/event_auth.py b/synapse/event_auth.py
index b55550eab9..64de3f7ef8 100644
--- a/synapse/event_auth.py
+++ b/synapse/event_auth.py
@@ -65,8 +65,8 @@ from synapse.api.room_versions import (
     RoomVersion,
     RoomVersions,
 )
-from synapse.state import CREATE_KEY
 from synapse.events import is_creator
+from synapse.state import CREATE_KEY
 from synapse.storage.databases.main.events_worker import EventRedactBehaviour
 from synapse.types import (
     MutableStateMap,
diff --git a/synapse/handlers/room.py b/synapse/handlers/room.py
index b8cb357c97..a8b29debd9 100644
--- a/synapse/handlers/room.py
+++ b/synapse/handlers/room.py
@@ -584,6 +584,7 @@ class RoomCreationHandler:
                 old_room_create_event,
                 tombstone_event_id,
                 new_room_version,
+                additional_creators=additional_creators,
             )
         initial_state = {}
 
diff --git a/tests/storage/test_redaction.py b/tests/storage/test_redaction.py
index c7ae5c815f..e2e48a5295 100644
--- a/tests/storage/test_redaction.py
+++ b/tests/storage/test_redaction.py
@@ -244,7 +244,6 @@ class RedactionTestCase(unittest.HomeserverTestCase):
             def __init__(self, base_builder: EventBuilder, event_id: str):
                 self._base_builder = base_builder
                 self._event_id = event_id
-                self.room_version = base_builder.room_version
 
             async def build(
                 self,