diff --git a/app/models/tracker.rb b/app/models/tracker.rb
index 3b75587..833c349 100644
--- a/app/models/tracker.rb
+++ b/app/models/tracker.rb
@@ -35,7 +35,7 @@ class Tracker < ActiveRecord::Base
   has_and_belongs_to_many :custom_fields, :class_name => 'IssueCustomField', :join_table => "#{table_name_prefix}custom_fields_trackers#{table_name_suffix}", :association_foreign_key => 'custom_field_id'
   acts_as_list
 
-  attr_protected :field_bits
+  attr_protected :fields_bits
 
   validates_presence_of :name
   validates_uniqueness_of :name