diff --git a/lib/rails/observers/activerecord/observer.rb b/lib/rails/observers/activerecord/observer.rb
index c90977a..5218008 100644
--- a/lib/rails/observers/activerecord/observer.rb
+++ b/lib/rails/observers/activerecord/observer.rb
@@ -123,3 +123,7 @@ def define_callbacks(klass)
       end
   end
 end
+
+if defined?(ActionController) and defined?(ActionController::Caching::Sweeping)
+  require 'rails/observers/action_controller/caching/sweeper'
+end