diff --git a/htdocs/core/lib/functions.lib.php b/htdocs/core/lib/functions.lib.php
index 53ec09f943b..e18d0c081c2 100644
--- a/htdocs/core/lib/functions.lib.php
+++ b/htdocs/core/lib/functions.lib.php
@@ -7227,7 +7227,10 @@ function getCommonSubstitutionArray($outputlangs, $onlykey = 0, $exclude = null,
 			if ($object->id > 0) {
 				$substitutionarray['__ONLINE_PAYMENT_TEXT_AND_URL__'] = ($paymenturl ?str_replace('\n', "\n", $outputlangs->trans("PredefinedMailContentLink", $paymenturl)) : '');
 				$substitutionarray['__ONLINE_PAYMENT_URL__'] = $paymenturl;
-
+				
+				if (is_object($object) && $object->element == 'propal') {
+					$substitutionarray['__ONLINE_SIGN_URL__'] = getOnlineSignatureUrl(0, 'proposal', $object->ref);
+				}
 				if (!empty($conf->global->PROPOSAL_ALLOW_EXTERNAL_DOWNLOAD) && is_object($object) && $object->element == 'propal') {
 					$substitutionarray['__DIRECTDOWNLOAD_URL_PROPOSAL__'] = $object->getLastMainDocLink($object->element);
 				} else {