diff --git a/lib/haml/helpers/action_view_mods.rb b/lib/haml/helpers/action_view_mods.rb
index 1832e55f..80b922ca 100644
--- a/lib/haml/helpers/action_view_mods.rb
+++ b/lib/haml/helpers/action_view_mods.rb
@@ -68,6 +68,10 @@ if action_view_included
           old_form_for(object_name, *args, &proc)
           concat "\n" if block_given? && is_haml?
         end
+
+        def generate_content_class_names
+          controller.controller_name + " " + controller.action_name
+        end
       end
     end
   end