Fix AttributeError

1 files changed, 1 insertions, 1 deletions

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

index 9ae3e5eca4..f38d9a48c8 100644
--- a/synapse/handlers/federation.py
+++ b/synapse/handlers/federation.py
@@ -687,7 +687,7 @@ class FederationHandler(BaseHandler):
             event.event_id, event.signatures,
         )
 
-        is_new_state = not event.internal_metadata.outlier
+        is_new_state = not event.internal_metadata.is_outlier()
 
         known_ids = set(
             [s.event_id for s in context.auth_events.values()]