diff --git a/htdocs/comm/propal/class/propal.class.php b/htdocs/comm/propal/class/propal.class.php
index acb543631d6..a3d9343cad7 100644
--- a/htdocs/comm/propal/class/propal.class.php
+++ b/htdocs/comm/propal/class/propal.class.php
@@ -3667,14 +3667,14 @@ class Propal extends CommonObject
 				}
 				$datas['customer'] = '<br><b>'.$langs->trans('Customer').':</b> '.$this->thirdparty->getNomUrl(1, '', 0, 1);
 			}
-			if (!empty($this->ref_client)) {
-				$datas['refcustomer'] = '<br><b>'.$langs->trans('RefCustomer').':</b> '.$this->ref_client;
+			if (!empty($this->ref_customer)) {
+				$datas['refcustomer'] = '<br><b>'.$langs->trans('RefCustomer').':</b> '.$this->ref_customer;
 			}
 			if (!$nofetch) {
 				$langs->load('project');
-				if (empty($this->project)) {
+				if (is_null($this->project) || (is_object($this->project) && $this->project->isEmpty())) {
 					$res = $this->fetch_project();
-					if ($res > 0 && !empty($this->project) && $this->project instanceof Project) {
+					if ($res > 0 && $this->project instanceof Project) {
 						$datas['project'] = '<br><b>'.$langs->trans('Project').':</b> '.$this->project->getNomUrl(1, '', 0, 1);
 					}
 				}
diff --git a/htdocs/commande/class/commande.class.php b/htdocs/commande/class/commande.class.php
index 1ef4754bae4..290dd95235c 100644
--- a/htdocs/commande/class/commande.class.php
+++ b/htdocs/commande/class/commande.class.php
@@ -3755,9 +3755,9 @@ class Commande extends CommonOrder
 			$datas['RefCustomer'] = '<br><b>'.$langs->trans('RefCustomer').':</b> '.(empty($this->ref_customer) ? (empty($this->ref_client) ? '' : $this->ref_client) : $this->ref_customer);
 			if (!$nofetch) {
 				$langs->load('project');
-				if (empty($this->project)) {
+				if (is_null($this->project) || (is_object($this->project) && $this->project->isEmpty())) {
 					$res = $this->fetch_project();
-					if ($res > 0 && !empty($this->project) && $this->project instanceof Project) {
+					if ($res > 0 && $this->project instanceof Project) {
 						$datas['project'] = '<br><b>'.$langs->trans('Project').':</b> '.$this->project->getNomUrl(1, '', 0, 1);
 					}
 				}