diff --git a/app/models/user_preference.rb b/app/models/user_preference.rb
index 5240c9757..d9601d516 100644
--- a/app/models/user_preference.rb
+++ b/app/models/user_preference.rb
@@ -17,7 +17,7 @@
 
 class UserPreference < ActiveRecord::Base
   belongs_to :user
-  serialize :others, Hash
+  serialize :others
   
   attr_protected :others