1 files changed, 3 insertions, 1 deletions
diff --git a/synapse/event_auth.py b/synapse/event_auth.py
index e885961698..19b55a9559 100644
--- a/synapse/event_auth.py
+++ b/synapse/event_auth.py
@@ -763,7 +763,9 @@ def get_named_level(auth_events: StateMap[EventBase], name: str, default: int) -
         return default
 
 
-def _verify_third_party_invite(event: EventBase, auth_events: StateMap[EventBase]):
+def _verify_third_party_invite(
+    event: EventBase, auth_events: StateMap[EventBase]
+) -> bool:
     """
     Validates that the invite event is authorized by a previous third-party invite.