1 files changed, 1 insertions, 1 deletions
diff --git a/synapse/storage/databases/main/room.py b/synapse/storage/databases/main/room.py
index dd7dbb6901..ca8be8c80d 100644
--- a/synapse/storage/databases/main/room.py
+++ b/synapse/storage/databases/main/room.py
@@ -996,7 +996,7 @@ class RoomWorkerStore(CacheInvalidationWorkerStore):
                 If it is `None` media will be removed from quarantine
         """
         logger.info("Quarantining media: %s/%s", server_name, media_id)
-        is_local = server_name == self.config.server.server_name
+        is_local = self.hs.is_mine_server_name(server_name)
 
         def _quarantine_media_by_id_txn(txn: LoggingTransaction) -> int:
             local_mxcs = [media_id] if is_local else []