diff --git a/app/views/attendances/index.json.jbuilder b/app/views/attendances/index.json.jbuilder
index 8a4dd2bb1..21fc68d71 100644
--- a/app/views/attendances/index.json.jbuilder
+++ b/app/views/attendances/index.json.jbuilder
@@ -1,5 +1,5 @@
 json.attendances @attendances do |attendance|
-  json.(attendance, :id, :name, :normal_count, :all_count, :mode)
+  json.(attendance, :id, :name, :normal_count, :all_count, :mode, :code)
   json.author do
     user = attendance.user
     json.user_name user.real_name