diff --git a/actionpack/README.rdoc b/actionpack/README.rdoc
index 5db4cff66b..2f3678881d 100644
--- a/actionpack/README.rdoc
+++ b/actionpack/README.rdoc
@@ -33,7 +33,7 @@ A short rundown of some of the major features:
 * Actions grouped in controller as methods instead of separate command objects
   and can therefore share helper methods
 
-    CustomersController < ActionController::Base
+    class CustomersController < ActionController::Base
       def show
         @customer = find_customer
       end