diff --git a/conf/infinity_mapping.json b/conf/infinity_mapping.json
index 83e3d5f982..64356ee8d5 100644
--- a/conf/infinity_mapping.json
+++ b/conf/infinity_mapping.json
@@ -3,6 +3,7 @@
 	"doc_id": {"type": "varchar", "default": ""},
 	"kb_id": {"type": "varchar", "default": "", "index_type": {"type": "secondary", "cardinality": "low"}},
 	"mom_id": {"type": "varchar", "default": ""},
+	"mom": {"type": "varchar", "default": ""},
 	"create_time": {"type": "varchar", "default": ""},
 	"create_timestamp_flt": {"type": "float", "default": 0.0},
 	"img_id": {"type": "varchar", "default": ""},