1 files changed, 1 insertions, 1 deletions
diff --git a/synapse/handlers/typing.py b/synapse/handlers/typing.py
index a97c448595..b84bd5e49a 100644
--- a/synapse/handlers/typing.py
+++ b/synapse/handlers/typing.py
@@ -73,7 +73,7 @@ class FollowerTypingHandler:
         self._room_typing: Dict[str, Set[str]] = {}
 
         self._member_last_federation_poke: Dict[RoomMember, int] = {}
-        self.wheel_timer = WheelTimer(bucket_size=5000)
+        self.wheel_timer: WheelTimer[RoomMember] = WheelTimer(bucket_size=5000)
         self._latest_room_serial = 0
 
         self.clock.looping_call(self._handle_timeouts, 5000)