3 files changed, 7 insertions, 4 deletions
diff --git a/actionpack/lib/abstract_controller/base.rb b/actionpack/lib/abstract_controller/base.rb
index 6e6786d0be..bb42f2e119 100644
--- a/actionpack/lib/abstract_controller/base.rb
+++ b/actionpack/lib/abstract_controller/base.rb
@@ -104,7 +104,7 @@ module AbstractController
       # ==== Returns
       # * <tt>String</tt>
       def controller_path
-        @controller_path ||= name.sub(/Controller$/, "".freeze).underscore unless anonymous?
+        @controller_path ||= name.sub(/Controller$/, "").underscore unless anonymous?
       end
 
       # Refresh the cached action_methods when a new action_method is added.
diff --git a/actionpack/lib/abstract_controller/helpers.rb b/actionpack/lib/abstract_controller/helpers.rb
index 3191584770..3913259ecc 100644
--- a/actionpack/lib/abstract_controller/helpers.rb
+++ b/actionpack/lib/abstract_controller/helpers.rb
@@ -181,7 +181,7 @@ module AbstractController
         end
 
         def default_helper_module!
-          module_name = name.sub(/Controller$/, "".freeze)
+          module_name = name.sub(/Controller$/, "")
           module_path = module_name.underscore
           helper module_path
         rescue LoadError => e
diff --git a/actionpack/lib/abstract_controller/railties/routes_helpers.rb b/actionpack/lib/abstract_controller/railties/routes_helpers.rb
index c97be074c8..fbd93705ed 100644
--- a/actionpack/lib/abstract_controller/railties/routes_helpers.rb
+++ b/actionpack/lib/abstract_controller/railties/routes_helpers.rb
@@ -7,8 +7,11 @@ module AbstractController
         Module.new do
           define_method(:inherited) do |klass|
             super(klass)
-
-            routes.include_helpers klass, include_path_helpers
+            if namespace = klass.module_parents.detect { |m| m.respond_to?(:railtie_routes_url_helpers) }
+              klass.include(namespace.railtie_routes_url_helpers(include_path_helpers))
+            else
+              klass.include(routes.url_helpers(include_path_helpers))
+            end
           end
         end
       end