1 files changed, 5 insertions, 2 deletions
diff --git a/synapse/storage/databases/main/stats.py b/synapse/storage/databases/main/stats.py
index e20033bb28..5d7b59d861 100644
--- a/synapse/storage/databases/main/stats.py
+++ b/synapse/storage/databases/main/stats.py
@@ -16,7 +16,7 @@
 import logging
 from enum import Enum
 from itertools import chain
-from typing import Any, Dict, List, Optional, Tuple
+from typing import TYPE_CHECKING, Any, Dict, List, Optional, Tuple
 
 from typing_extensions import Counter
 
@@ -29,6 +29,9 @@ from synapse.storage.databases.main.state_deltas import StateDeltasStore
 from synapse.types import JsonDict
 from synapse.util.caches.descriptors import cached
 
+if TYPE_CHECKING:
+    from synapse.server import HomeServer
+
 logger = logging.getLogger(__name__)
 
 # these fields track absolutes (e.g. total number of rooms on the server)
@@ -93,7 +96,7 @@ class UserSortOrder(Enum):
 
 
 class StatsStore(StateDeltasStore):
-    def __init__(self, database: DatabasePool, db_conn, hs):
+    def __init__(self, database: DatabasePool, db_conn, hs: "HomeServer"):
         super().__init__(database, db_conn, hs)
 
         self.server_name = hs.hostname