diff --git a/db/migrate/20160204111716_add_user_to_code_harbor_link.rb b/db/migrate/20160204111716_add_user_to_code_harbor_link.rb
index 8fa36ed1..fe509666 100644
--- a/db/migrate/20160204111716_add_user_to_code_harbor_link.rb
+++ b/db/migrate/20160204111716_add_user_to_code_harbor_link.rb
@@ -1,5 +1,5 @@
 class AddUserToCodeHarborLink < ActiveRecord::Migration
   def change
-    add_reference :code_harbor_links, :user, index: true, foreign_key: true
+    add_reference :code_harbor_links, :user,  polymorphic: true, index: true
   end
 end