diff --git a/synapse/storage/receipts.py b/synapse/storage/receipts.py
index fb35472ad7..46c06e42b1 100644
--- a/synapse/storage/receipts.py
+++ b/synapse/storage/receipts.py
@@ -19,8 +19,6 @@ from synapse.util.caches import cache_counter, caches_by_name
 
 from twisted.internet import defer
 
-from synapse.util import unwrapFirstError
-
 from blist import sorteddict
 import logging
 import ujson as json