/assets route should not be prefixed

Sprokets thing is attached as a last route. So if I have something like this in my routes:

Rails.application.routes.draw do
  get '/' => :render_page, :as => 'pages', :path => '(*page_path)'
end

My catch-all route will not allow /assets to map to a proper place. This is what I see in rake routes

pages GET    /(*page_path)(.:format)  {:controller=>"pages", :action=>"render_page"}
             /assets                  {:to=>#<Sprockets::Environment:0x00000100f5d240 ...

/assets route should be defined before any of my application routes.