1 files changed, 3 insertions, 2 deletions
diff --git a/synapse/replication/slave/storage/_base.py b/synapse/replication/slave/storage/_base.py
index 6ece1d6745..b91a528245 100644
--- a/synapse/replication/slave/storage/_base.py
+++ b/synapse/replication/slave/storage/_base.py
@@ -20,6 +20,7 @@ import six
 
 from synapse.storage._base import SQLBaseStore
 from synapse.storage.data_stores.main.cache import CURRENT_STATE_CACHE_NAME
+from synapse.storage.database import Database
 from synapse.storage.engines import PostgresEngine
 
 from ._slaved_id_tracker import SlavedIdTracker
@@ -35,8 +36,8 @@ def __func__(inp):
 
 
 class BaseSlavedStore(SQLBaseStore):
-    def __init__(self, db_conn, hs):
-        super(BaseSlavedStore, self).__init__(db_conn, hs)
+    def __init__(self, database: Database, db_conn, hs):
+        super(BaseSlavedStore, self).__init__(database, db_conn, hs)
         if isinstance(self.database_engine, PostgresEngine):
             self._cache_id_gen = SlavedIdTracker(
                 db_conn, "cache_invalidation_stream", "stream_id"