diff --git a/app/models/diploma.rb b/app/models/diploma.rb
index 3950053..c97fe47 100644
--- a/app/models/diploma.rb
+++ b/app/models/diploma.rb
@@ -15,6 +15,7 @@ class Diploma
   field :end_date , :type => Date
   field :url
   field :note
+  field :rss2_id
   field :create_user_id, :type => BSON::ObjectId
   field :update_user_id, :type => BSON::ObjectId