3 files changed, 4 insertions, 4 deletions
diff --git a/actionpack/lib/action_controller/caching/pages.rb b/actionpack/lib/action_controller/caching/pages.rb
index 4307f39583..755f1e4e0a 100644
--- a/actionpack/lib/action_controller/caching/pages.rb
+++ b/actionpack/lib/action_controller/caching/pages.rb
@@ -36,7 +36,7 @@ module ActionController #:nodoc:
     # == Setting the cache directory
     #
     # The cache directory should be the document root for the web server and is set using Base.page_cache_directory = "/document/root".
-    # For Rails, this directory has already been set to RAILS_ROOT + "/public".
+    # For Rails, this directory has already been set to Rails.public_path (which is usually set to RAILS_ROOT + "/public").
     #
     # == Setting the cache extension
     #
@@ -46,7 +46,7 @@ module ActionController #:nodoc:
       def self.included(base) #:nodoc:
         base.extend(ClassMethods)
         base.class_eval do
-          @@page_cache_directory = defined?(RAILS_ROOT) ? "#{RAILS_ROOT}/public" : ""
+          @@page_cache_directory = defined?(Rails.public_path) ? Rails.public_path : ""
           cattr_accessor :page_cache_directory
 
           @@page_cache_extension = '.html'
diff --git a/actionpack/lib/action_controller/dispatcher.rb b/actionpack/lib/action_controller/dispatcher.rb
index 92576bdb2b..30db7d9f73 100644
--- a/actionpack/lib/action_controller/dispatcher.rb
+++ b/actionpack/lib/action_controller/dispatcher.rb
@@ -67,7 +67,7 @@ module ActionController
     end
 
     cattr_accessor :error_file_path
-    self.error_file_path = "#{::RAILS_ROOT}/public" if defined? ::RAILS_ROOT
+    self.error_file_path = Rails.public_path if defined?(Rails.public_path)
 
     cattr_accessor :unprepared
     self.unprepared = true
diff --git a/actionpack/lib/action_controller/rescue.rb b/actionpack/lib/action_controller/rescue.rb
index b91115a93c..f5ad04532b 100644
--- a/actionpack/lib/action_controller/rescue.rb
+++ b/actionpack/lib/action_controller/rescue.rb
@@ -153,7 +153,7 @@ module ActionController #:nodoc:
       # If the file doesn't exist, the body of the response will be left empty.
       def render_optional_error_file(status_code)
         status = interpret_status(status_code)
-        path = "#{RAILS_ROOT}/public/#{status[0,3]}.html"
+        path = "#{Rails.public_path}/#{status[0,3]}.html"
         if File.exist?(path)
           render :file => path, :status => status
         else