diff --git a/lib/tasks/load_default_data.rake b/lib/tasks/load_default_data.rake
index cc6774bce..bcfff7c3b 100644
--- a/lib/tasks/load_default_data.rake
+++ b/lib/tasks/load_default_data.rake
@@ -2,6 +2,7 @@ desc 'Load Redmine default configuration data. Language is chosen interactively
 
 namespace :redmine do
   task :load_default_data => :environment do
+    require 'custom_field'
     include Redmine::I18n
     set_language_if_valid('en')