How to create this link

I have a problem with Ajax.
I have some method who returns link_to some_path, :anchor => "anchor"
and replace content area on page.

At start a have this:

browser path => /help

<%= link_to "Downloads", download_page_path, :remote => true %>

I click link and got this:

browser path => /help

<a href="/download#anchor">link...</a>

But I want this:

browser path => /help

<a href="/help#anchor">link...</a> or <a href="#anchor">link...</a>

How can I do it?