diff --git a/lib/ap.rb b/lib/ap.rb
index d53e37e..6572d1b 100755
--- a/lib/ap.rb
+++ b/lib/ap.rb
@@ -11,4 +11,5 @@ require File.dirname(__FILE__) + "/ap/core_ext/logger" if defined?(::Logger) or
 
 require File.dirname(__FILE__) + "/ap/mixin/active_record" if defined?(::ActiveRecord)
 require File.dirname(__FILE__) + "/ap/mixin/active_support" if defined?(::ActiveSupport)
+require File.dirname(__FILE__) + "/ap/mixin/application_helper" if defined?(::ApplicationHelper)
 
diff --git a/lib/ap/mixin/application_helper.rb b/lib/ap/mixin/application_helper.rb
new file mode 100644
index 0000000..c174fe3
--- /dev/null
+++ b/lib/ap/mixin/application_helper.rb
@@ -0,0 +1,5 @@
+module ApplicationHelper
+  def ap_debug(obj)
+    content_tag(:pre, obj.ai(:plain => true), :class => 'debug_dump')
+  end
+end