diff --git a/actionmailer/lib/action_mailer/railtie.rb b/actionmailer/lib/action_mailer/railtie.rb
index d67a5b6521..4ec478067f 100644
--- a/actionmailer/lib/action_mailer/railtie.rb
+++ b/actionmailer/lib/action_mailer/railtie.rb
@@ -19,8 +19,8 @@ module ActionMailer
       options.stylesheets_dir ||= paths["public/stylesheets"].first
 
       # make sure readers methods get compiled
-      options.asset_path           ||= nil
-      options.asset_host           ||= nil
+      options.asset_path           ||= app.config.asset_path
+      options.asset_host           ||= app.config.asset_host
 
       ActiveSupport.on_load(:action_mailer) do
         include AbstractController::UrlFor
diff --git a/actionpack/lib/action_controller/railtie.rb b/actionpack/lib/action_controller/railtie.rb
index c5a661f2b0..f0c29825ba 100644
--- a/actionpack/lib/action_controller/railtie.rb
+++ b/actionpack/lib/action_controller/railtie.rb
@@ -27,8 +27,8 @@ module ActionController
       options.page_cache_directory ||= paths["public"].first
 
       # make sure readers methods get compiled
-      options.asset_path           ||= nil
-      options.asset_host           ||= nil
+      options.asset_path           ||= app.config.asset_path
+      options.asset_host           ||= app.config.asset_host
 
       ActiveSupport.on_load(:action_controller) do
         include app.routes.mounted_helpers
diff --git a/railties/lib/rails/application/configuration.rb b/railties/lib/rails/application/configuration.rb
index 3505388479..8cd496781b 100644
--- a/railties/lib/rails/application/configuration.rb
+++ b/railties/lib/rails/application/configuration.rb
@@ -4,12 +4,12 @@ require 'rails/engine/configuration'
 module Rails
   class Application
     class Configuration < ::Rails::Engine::Configuration
-      attr_accessor :allow_concurrency, :cache_classes, :cache_store,
+      attr_accessor :allow_concurrency, :asset_host, :cache_classes, :cache_store,
                     :encoding, :consider_all_requests_local, :dependency_loading,
-                    :filter_parameters,  :log_level, :logger,
+                    :filter_parameters, :helpers_paths, :log_level, :logger,
                     :preload_frameworks, :reload_plugins,
                     :secret_token, :serve_static_assets, :session_options,
-                    :time_zone, :whiny_nils, :helpers_paths
+                    :time_zone, :whiny_nils
 
       def initialize(*)
         super
@@ -24,22 +24,9 @@ module Rails
         @session_options = {}
         @time_zone = "UTC"
         @middleware = app_middleware
-        @asset_path = '/'
         @generators = app_generators
       end
 
-      def asset_path=(value)
-        action_mailer.asset_path = value if respond_to?(:action_mailer) && action_mailer
-        action_controller.asset_path = value if respond_to?(:action_controller) && action_controller
-        super(value)
-      end
-
-      def asset_host=(value)
-        action_mailer.asset_host = value if action_mailer
-        action_controller.asset_host = value if action_controller
-        super(value)
-      end
-
       def compiled_asset_path
         "/"
       end