Correcting link to DM claim interface.

wizard/templates/wizard/whoami.html

@@ -16,7 +16,7 @@
       {% blocktrans with request_user_username=request.user.username %}You
       are currently logged in, but not mapped to any person in the site.
       If you are a Debian Maintainer, you can try to correct the situation using the
-      <a href="{{dm_claim}}">claim interface</a>.{% endblocktrans %}
+      <a href="{{dm_claim_url}}">claim interface</a>.{% endblocktrans %}
 
       {% url 'public_newnm' as public_newnm_url %}
       {% blocktrans %}If you are not yet in the site,