diff --git a/actionpack/lib/action_dispatch/routing/mapper.rb b/actionpack/lib/action_dispatch/routing/mapper.rb
index 57a5bc681e27a..2b43ade0817ad 100644
--- a/actionpack/lib/action_dispatch/routing/mapper.rb
+++ b/actionpack/lib/action_dispatch/routing/mapper.rb
@@ -473,7 +473,7 @@ module Base
         #   <tt>params[<:param>]</tt>.
         #   In your router:
         #
-        #      resources :user, param: :name
+        #      resources :users, param: :name
         #
         #   You can override <tt>ActiveRecord::Base#to_param</tt> of a related
         #   model to construct a URL: