diff --git a/htdocs/comm/propal/class/propal.class.php b/htdocs/comm/propal/class/propal.class.php
index cd56fac3e7b..e2b128f8cd0 100644
--- a/htdocs/comm/propal/class/propal.class.php
+++ b/htdocs/comm/propal/class/propal.class.php
@@ -384,7 +384,7 @@ class Propal extends CommonObject
 		$this->socid = $socid;
 		$this->id = $propalid;
 
-		$this->duree_validite = isset($conf->global->PROPALE_VALIDITY_DURATION)?((int) $conf->global->PROPALE_VALIDITY_DURATION):0;
+		$this->duree_validite = getDolGlobalInt('PROPALE_VALIDITY_DURATION', 0);
 	}