diff --git a/synapse/storage/client_ips.py b/synapse/storage/client_ips.py
index 6f8140626..cc23d7cdb 100644
--- a/synapse/storage/client_ips.py
+++ b/synapse/storage/client_ips.py
@@ -124,7 +124,7 @@ class ClientIpStore(background_updates.BackgroundUpdateStore):
         def user_ips_analyze(txn):
             txn.execute("ANALYZE user_ips")
 
-        end_last_seen = yield self.runInteraction(
+        yield self.runInteraction(
             "user_ips_analyze", user_ips_analyze
         )