diff --git a/koha-tmpl/intranet-tmpl/prog/en/modules/members/memberentrygen.tt b/koha-tmpl/intranet-tmpl/prog/en/modules/members/memberentrygen.tt
index 7b1ca22271..7f6e435092 100644
--- a/koha-tmpl/intranet-tmpl/prog/en/modules/members/memberentrygen.tt
+++ b/koha-tmpl/intranet-tmpl/prog/en/modules/members/memberentrygen.tt
@@ -359,7 +359,7 @@ $(document).ready(function() {
  [% ELSE %]
  <li id="contact-details" style="display: none">
  [% END %]
-     <span class="label">Patron #:</span> [% IF ( guarantorid ) %] <a href="/cgi-bin/koha/members/moremember.pl?borrowernumber=[% guarantorid %]" target="blank">[% guarantorid %]</a>[% END %]
+     <span class="label">Patron #:</span> [% IF ( guarantorid ) %] <a href="/cgi-bin/koha/members/moremember.pl?borrowernumber=[% guarantorid %]" target="blank">[% guarantorid |html %]</a>[% END %]
  </li>
         [% UNLESS nocontactname %]
  <li>