diff --git a/csst_dfs_api/facility/level2.py b/csst_dfs_api/facility/level2.py
index 8dc4af296b2c1887991fc8027d94319f670eefe6..2183b585a57606bafe54106bded2eb29d933d376 100644
--- a/csst_dfs_api/facility/level2.py
+++ b/csst_dfs_api/facility/level2.py
@@ -19,6 +19,7 @@ class Level2DataApi(object):
             module_id: [str]
             brick_id: [int]
             data_type: [str]
+            object_name: [str]
             create_time : (start, end),
             qc2_status : [int],
             prc_status : [int],