diff --git a/railties/guides/source/layouts_and_rendering.textile b/railties/guides/source/layouts_and_rendering.textile
index 7e9194729e..5627b131ed 100644
--- a/railties/guides/source/layouts_and_rendering.textile
+++ b/railties/guides/source/layouts_and_rendering.textile
@@ -445,7 +445,7 @@ end
 
 <ruby>
 class OldPostsController < SpecialPostsController
-  layout nil
+  layout false
 
   def show
     @post = Post.find(params[:id])