diff --git a/synapse/handlers/typing.py b/synapse/handlers/typing.py
index ab698b36e111e7056b05cf6066c9d093c7db378f..15039ff0da5805ea8b061fa6f0dfd61d8baf8df4 100644
--- a/synapse/handlers/typing.py
+++ b/synapse/handlers/typing.py
@@ -83,9 +83,15 @@ class TypingNotificationHandler(BaseHandler):
         if member in self._member_typing_timer:
             self.clock.cancel_call_later(self._member_typing_timer[member])
 
+        def _cb():
+            logger.debug(
+                "%s has timed out in %s", target_user.to_string(), room_id
+            )
+            self._stopped_typing(member)
+
         self._member_typing_until[member] = until
         self._member_typing_timer[member] = self.clock.call_later(
-            timeout / 1000, lambda: self._stopped_typing(member)
+            timeout / 1000, _cb
         )
 
         if was_present: