Namespaced routes not working on Rails 3

If my routes.rb contains:

  namespace :admin do
    resources :pages
  end

Then my routes will have the wrong controller ('pages' instead of 'admin/pages').
Output of 'rake routes':

    admin_pages GET    /admin/pages(.:format)          {:controller=>"pages", :action=>"index"}
                POST   /admin/pages(.:format)          {:controller=>"pages", :action=>"create"}
 new_admin_page GET    /admin/pages/new(.:format)      {:controller=>"pages", :action=>"new"}
     admin_page GET    /admin/pages/:id(.:format)      {:controller=>"pages", :action=>"show"}
                PUT    /admin/pages/:id(.:format)      {:controller=>"pages", :action=>"update"}
                DELETE /admin/pages/:id(.:format)      {:controller=>"pages", :action=>"destroy"}
edit_admin_page GET    /admin/pages/:id/edit(.:format) {:controller=>"pages", :action=>"edit"}

My patch seems to fix the issue. As far as I can tell it doesn't break anything.