1 files changed, 3 insertions, 2 deletions
diff --git a/synapse/storage/databases/main/rejections.py b/synapse/storage/databases/main/rejections.py
index cf9ba51205..1e361aaa9a 100644
--- a/synapse/storage/databases/main/rejections.py
+++ b/synapse/storage/databases/main/rejections.py
@@ -14,6 +14,7 @@
 # limitations under the License.
 
 import logging
+from typing import Optional
 
 from synapse.storage._base import SQLBaseStore
 
@@ -21,8 +22,8 @@ logger = logging.getLogger(__name__)
 
 
 class RejectionsStore(SQLBaseStore):
-    def get_rejection_reason(self, event_id):
-        return self.db_pool.simple_select_one_onecol(
+    async def get_rejection_reason(self, event_id: str) -> Optional[str]:
+        return await self.db_pool.simple_select_one_onecol(
             table="rejections",
             retcol="reason",
             keyvalues={"event_id": event_id},