diff --git a/app/helpers/queries_helper.rb b/app/helpers/queries_helper.rb
index 5f2f53fc7..acab44536 100644
--- a/app/helpers/queries_helper.rb
+++ b/app/helpers/queries_helper.rb
@@ -17,6 +17,8 @@
 # along with this program; if not, write to the Free Software
 # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 
+require 'redmine/export/csv'
+
 module QueriesHelper
   include ApplicationHelper
 
diff --git a/app/models/user_preference.rb b/app/models/user_preference.rb
index 1bf60c7f6..efdc41e2d 100644
--- a/app/models/user_preference.rb
+++ b/app/models/user_preference.rb
@@ -15,6 +15,8 @@
 # along with this program; if not, write to the Free Software
 # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 
+require 'redmine/my_page'
+
 class UserPreference < ActiveRecord::Base
   include Redmine::SafeAttributes