1 files changed, 1 insertions, 1 deletions
diff --git a/synapse/storage/databases/main/keys.py b/synapse/storage/databases/main/keys.py
index 0e86807834..6990f3ed1d 100644
--- a/synapse/storage/databases/main/keys.py
+++ b/synapse/storage/databases/main/keys.py
@@ -55,7 +55,7 @@ class KeyStore(SQLBaseStore):
         """
         keys = {}
 
-        def _get_keys(txn: Cursor, batch: Tuple[Tuple[str, str]]) -> None:
+        def _get_keys(txn: Cursor, batch: Tuple[Tuple[str, str], ...]) -> None:
             """Processes a batch of keys to fetch, and adds the result to `keys`."""
 
             # batch_iter always returns tuples so it's safe to do len(batch)