diff --git a/lib/authlogic/controller_adapters/rails_adapter.rb b/lib/authlogic/controller_adapters/rails_adapter.rb
index f7b9ac7f..9b10b4d0 100644
--- a/lib/authlogic/controller_adapters/rails_adapter.rb
+++ b/lib/authlogic/controller_adapters/rails_adapter.rb
@@ -1,3 +1,5 @@
+require 'action_controller'
+
 module Authlogic
   module ControllerAdapters
     # Adapts authlogic to work with rails. The point is to close the gap between what authlogic expects and what the rails controller object