1 files changed, 1 insertions, 1 deletions
diff --git a/synapse/replication/slave/storage/client_ips.py b/synapse/replication/slave/storage/client_ips.py
index 1f8dafe7ea..273d627fad 100644
--- a/synapse/replication/slave/storage/client_ips.py
+++ b/synapse/replication/slave/storage/client_ips.py
@@ -26,7 +26,7 @@ class SlavedClientIpStore(BaseSlavedStore):
 
         self.client_ip_last_seen = Cache(
             name="client_ip_last_seen", keylen=4, max_entries=50000
-        )
+        )  # type: Cache[tuple, int]
 
     async def insert_client_ip(self, user_id, access_token, ip, user_agent, device_id):
         now = int(self._clock.time_msec())