diff --git a/llumnix/manager.py b/llumnix/manager.py
index 3308fc1d..b756c1ae 100644
--- a/llumnix/manager.py
+++ b/llumnix/manager.py
@@ -263,7 +263,7 @@ async def migrate_done_callback(ret, migrate_instance_pair: Tuple[str, str]) ->
                         logger.info("Instance {} is dead.".format(instance_id))
                         self.scale_down(instance_id)
             else:
-                migrate_out_request_ids = ret[0]
+                migrate_out_request_ids = ret
                 if migrate_out_request_ids:
                     migrate_out_request_id = migrate_out_request_ids[0]
                     self.request_instance[migrate_out_request_id] = migrate_instance_pair[1]