diff --git a/htdocs/admin/pdf.php b/htdocs/admin/pdf.php
index 7d7b5e36a40..f465f86f01e 100644
--- a/htdocs/admin/pdf.php
+++ b/htdocs/admin/pdf.php
@@ -4,6 +4,7 @@
  * Copyright (C) 2005-2011 Regis Houssin        <regis.houssin@inodbox.com>
  * Copyright (C) 2012-2107 Juanjo Menent		<jmenent@2byte.es>
  * Copyright (C) 2019	   Ferran Marcet		<fmarcet@2byte.es>
+ * Copyright (C) 2021	   Anthony Berton		<bertonanthony@gmail.com>
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -417,6 +418,15 @@ print '<tr class="oddeven"><td>'.$langs->trans("ShowDetailsInPDFPageFoot").'</td
 print $form->selectarray('MAIN_GENERATE_DOCUMENTS_SHOW_FOOT_DETAILS', $arraydetailsforpdffoot, (!empty($conf->global->MAIN_GENERATE_DOCUMENTS_SHOW_FOOT_DETAILS) ? $conf->global->MAIN_GENERATE_DOCUMENTS_SHOW_FOOT_DETAILS : 0));
 print '</td></tr>';
 
+print '<tr class="oddeven"><td>'.$langs->trans("PDF_INCLUDE_ALIAS_IN_THIRDPARTY_NAME").'</td><td>';
+if ($conf->use_javascript_ajax) {
+	print ajax_constantonoff('PDF_INCLUDE_ALIAS_IN_THIRDPARTY_NAME');
+} else {
+	$arrval = array('0' => $langs->trans("No"), '1' => $langs->trans("Yes"));
+	print $form->selectarray("PDF_INCLUDE_ALIAS_IN_THIRDPARTY_NAME", $arrval, $conf->global->PDF_INCLUDE_ALIAS_IN_THIRDPARTY_NAME);
+}
+print '</td></tr>';
+
 print '</table>';
 print '</div>';