diff --git a/htdocs/compta/facture.php b/htdocs/compta/facture.php
index 7f5b33ee73af4b3055eabe26009f1d4454874bec..143c93cfe22f01a9110195fa8f7219ab810b6cc0 100644
--- a/htdocs/compta/facture.php
+++ b/htdocs/compta/facture.php
@@ -3851,6 +3851,7 @@ else if ($id > 0 || ! empty($ref))
 		$formmail->substit['__REFCLIENT__'] = $object->ref_client;
 		$formmail->substit['__THIRPARTY_NAME__'] = $object->thirdparty->name;
 		$formmail->substit['__PROJECT_REF__'] = (is_object($object->projet)?$object->projet->ref:'');
+		$formmail->substit['__PROJECT_NAME__'] = (is_object($object->projet)?$object->projet->title:'');
 		$formmail->substit['__PERSONALIZED__'] = '';
 		$formmail->substit['__CONTACTCIVNAME__'] = '';