problem calling macro with < />

In my freemarker xml file, I have this line:

<header name=&quot;id&quot; value=&quot;&lt;@getId />" />

The macro is:

<#macro getId>
    20
</#macro>

But the above macro is never evaluated, so the above code doesn't become:

<header name="id" value="20" />

Any idea?

Thanks.

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