link inside of funcdef

Dear Docbook users!

I would like to insert some hyperlink in the funcdef element. However,
in the HTML output the linking is not possible. Could someone help in
this problem, how it is possible to include the hyperlink into the
funcdef?

Thank you in advance,

Ors Sepsi

Here is some example:

<funcsynopsis>
<funcprototype>
<?dbhtml funcsynopsis-style='ansi'?>
<funcdef><link linkend='link1">text1</link> <function>func</function></funcdef>
    <paramdef>double <parameter>a</parameter></paramdef>
    <paramdef>double <parameter>b</parameter></paramdef>
</funcprototype></funcsynopsis>