diff --git a/lib/rucio/core/rule.py b/lib/rucio/core/rule.py
index b1ef6e099d..6d06a84867 100644
--- a/lib/rucio/core/rule.py
+++ b/lib/rucio/core/rule.py
@@ -950,9 +950,9 @@ def list_rules(filters: dict[str, Any] = {}, *, session: "Session") -> Iterator[
             stmt = stmt.where(getattr(models.ReplicationRule, key) == value)
 
     try:
-        for item in session.execute(stmt).yield_per(5):
-            d = item[0].to_dict()
-            d['bytes'] = item[1]
+        for rule, data_identifier_bytes in session.execute(stmt).yield_per(5):
+            d = rule.to_dict()
+            d['bytes'] = data_identifier_bytes
             yield d
     except StatementError as exc:
         raise RucioException('Badly formatted input (IDs?)') from exc