diff --git a/apps/mtm/serializers.py b/apps/mtm/serializers.py
index 608756ab..e63b3bab 100644
--- a/apps/mtm/serializers.py
+++ b/apps/mtm/serializers.py
@@ -207,7 +207,7 @@ class RouteSerializer(CustomModelSerializer):
                                                                                           'specification': material.specification,
                                                                                           'model': material.model,
                                                                                           'type': Material.MA_TYPE_HALFGOOD,
-                                                                                          'cate': Material.cate,
+                                                                                          'cate': material.cate,
                                                                                           'create_by': self.request.user,
                                                                                           'update_by': self.request.user,
                                                                                           })