Keeping footnotes done with dt -> dd together?

[Lukusaukko]

I have a epub with footnotes formatted like this:

    <aside id="fn29" epub:type="footnote">

      <dl>

        <dt>29.</dt>

        <dd>

          <p>Lorem ipsum etc.</p>

        </dd>

      </dl>

    </aside>

For the most part, this works fine, but sometimes Koreader displays the contents of <dt> on the page where the reference to it is, with the rest of it on the next page. I've tried setting break-after: avoid to <dt>, but it doesn't have any effect. Is there any Koreader setting/tweak that could be used to keep the <dt> and <dd> (the first line at least) together so they don't drop to different pages?