diff --git a/synapse/storage/databases/main/event_federation.py b/synapse/storage/databases/main/event_federation.py
index dd828fe5cf..2cbc634370 100644
--- a/synapse/storage/databases/main/event_federation.py
+++ b/synapse/storage/databases/main/event_federation.py
@@ -14,7 +14,7 @@
 import itertools
 import logging
 from queue import Empty, PriorityQueue
-from typing import Collection, Dict, Iterable, List, Optional, OrderedDict, Set, Tuple
+from typing import Collection, Dict, Iterable, List, Optional, Set, Tuple
 
 from prometheus_client import Counter, Gauge