diff --git a/app/models/subject.rb b/app/models/subject.rb
index 289e7c2..cdf26f7 100644
--- a/app/models/subject.rb
+++ b/app/models/subject.rb
@@ -17,6 +17,7 @@ class Subject
   field :student, localize: true
   field :email_member_ids 
   field :co_professor_ids
+  field :rss2_id
   mount_uploader :image, ImageUploader
   has_many :subject_links, :autosave => true, :dependent => :destroy