1 files changed, 2 insertions, 2 deletions
diff --git a/synapse/storage/databases/main/monthly_active_users.py b/synapse/storage/databases/main/monthly_active_users.py
index d788dc0fc6..757da3d55d 100644
--- a/synapse/storage/databases/main/monthly_active_users.py
+++ b/synapse/storage/databases/main/monthly_active_users.py
@@ -13,7 +13,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 import logging
-from typing import Dict, List
+from typing import Dict, List, Optional
 
 from synapse.metrics.background_process_metrics import wrap_as_background_process
 from synapse.storage._base import SQLBaseStore
@@ -109,7 +109,7 @@ class MonthlyActiveUsersWorkerStore(SQLBaseStore):
         return users
 
     @cached(num_args=1)
-    async def user_last_seen_monthly_active(self, user_id: str) -> int:
+    async def user_last_seen_monthly_active(self, user_id: str) -> Optional[int]:
         """
         Checks if a given user is part of the monthly active user group