How to generate links with trailing slash in Rails 3?

I'm porting the existing website from PHP to Ruby on Rails 3 and I have to keep the urls unchanged.

I have the route:

get 'companies/' => 'companies#index', :as => :companies

In a view file I have:

link_to 'Companies', companies_path

and this generates the url "http://website.com/companies" instead of "http://website.com/companies/".

I want the slash at the end of the url. Is it possible?