Rails: will_paginate run extra SQL query when calling page_entries_info

My application using rails '3.2.20', mysql2 '0.3.20' and will_paginate '3.0.7'

I'm trying to load user records

@users = User.paginate(:page => params[:page], :per_page => 20)

Below queries executed in console

User Load (0.3ms)  SELECT `users`.* FROM `users` LIMIT 20 OFFSET 0
(0.3ms)  SELECT COUNT(*) FROM `users` 

Generally will_paginate run two queries for collections and count

But I got one more extra query when used page_entries_info in view

User Load (0.3ms)  SELECT `users`.* FROM `users` LIMIT 20 OFFSET 0
(0.3ms)  SELECT COUNT(*) FROM `users` 
User Load (0.2ms)  SELECT `users`.* FROM `users` LIMIT 1 OFFSET 0

hope last query is not used anywhere.

I just illustrate with simple example, but my application executes large query with more joins and includes.

It may slow down the performance with unnecessary query.

This occurs only after will_paginate '3.0.3'

is it bug/functionality? how to avoid this extra query?