diff --git a/extensions/social_engineering/models/mass_mailer.rb b/extensions/social_engineering/models/mass_mailer.rb
index 4e43efdc5..317571093 100644
--- a/extensions/social_engineering/models/mass_mailer.rb
+++ b/extensions/social_engineering/models/mass_mailer.rb
@@ -9,7 +9,7 @@ module BeEF
 
       class Massmailer < ActiveRecord::Base
 
-        attribute :id, Serial
+        attribute :id, :Serial
 
         #todo fields
       end