diff --git a/lib/delayed_job.rb b/lib/delayed_job.rb
index 482cb2ff0..b45974950 100644
--- a/lib/delayed_job.rb
+++ b/lib/delayed_job.rb
@@ -1,4 +1,4 @@
-autoload :ActiveRecord, 'activerecord'
+autoload :ActiveRecord, 'active_record'
 
 require File.dirname(__FILE__) + '/delayed/message_sending'
 require File.dirname(__FILE__) + '/delayed/performable_method'