diff --git a/htdocs/contrat/class/contrat.class.php b/htdocs/contrat/class/contrat.class.php
index 61e41356b6b..b7ad87e644d 100644
--- a/htdocs/contrat/class/contrat.class.php
+++ b/htdocs/contrat/class/contrat.class.php
@@ -1689,7 +1689,7 @@ class Contrat extends CommonObject
 		$this->id=0;
 		$this->specimen=1;
 
-		$this->ref = 'DOLIBARR';
+		$this->ref = 'SPECIMEN';
 		$this->socid = 1;
 		$this->statut= 0;
 		$this->date_contrat = dol_now();