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-rw-r--r--synapse/storage/databases/main/state.py5
1 files changed, 2 insertions, 3 deletions
diff --git a/synapse/storage/databases/main/state.py b/synapse/storage/databases/main/state.py
index 96e0378e50..991233a9bc 100644
--- a/synapse/storage/databases/main/state.py
+++ b/synapse/storage/databases/main/state.py
@@ -273,12 +273,11 @@ class StateGroupWorkerStore(EventsWorkerStore, SQLBaseStore):
         cached_method_name="_get_state_group_for_event",
         list_name="event_ids",
         num_args=1,
-        inlineCallbacks=True,
     )
-    def _get_state_group_for_events(self, event_ids):
+    async def _get_state_group_for_events(self, event_ids):
         """Returns mapping event_id -> state_group
         """
-        rows = yield self.db_pool.simple_select_many_batch(
+        rows = await self.db_pool.simple_select_many_batch(
             table="event_to_state_groups",
             column="event_id",
             iterable=event_ids,