diff --git a/services/storage/src/simcore_service_storage/db_file_meta_data.py b/services/storage/src/simcore_service_storage/db_file_meta_data.py
index 5a2723ee0be5..90e9a7658d57 100644
--- a/services/storage/src/simcore_service_storage/db_file_meta_data.py
+++ b/services/storage/src/simcore_service_storage/db_file_meta_data.py
@@ -74,7 +74,7 @@ def _list_filter_with_partial_file_id_stmt(
     limit: int | None = None,
     offset: int | None = None,
 ):
-    conditions = []
+    conditions: list = []
 
     # Ownership check.Disabled if
     user_id = user_or_project_filter.user_id