diff --git a/htdocs/core/class/html.formsetup.class.php b/htdocs/core/class/html.formsetup.class.php
index 6b1ab1cb007..1d37adbb306 100644
--- a/htdocs/core/class/html.formsetup.class.php
+++ b/htdocs/core/class/html.formsetup.class.php
@@ -706,10 +706,10 @@ class FormSetupItem
 	{
 		global $conf;
 		if (isset($conf->global->{$this->confKey})) {
-			$this->fieldValue = getDolGlobalString($this->confKey);
+			$this->fieldValue = getDolGlobalString($this->confKey, null);
 			return true;
 		} else {
-			$this->fieldValue = '';
+			$this->fieldValue = null;
 			return false;
 		}
 	}
diff --git a/htdocs/core/modules/facture/doc/pdf_crabe.modules.php b/htdocs/core/modules/facture/doc/pdf_crabe.modules.php
index 8b4acc88d42..646f2c3c196 100644
--- a/htdocs/core/modules/facture/doc/pdf_crabe.modules.php
+++ b/htdocs/core/modules/facture/doc/pdf_crabe.modules.php
@@ -1359,6 +1359,7 @@ class pdf_crabe extends ModelePDFFactures
 
 					$langs->loadLangs(array('payment', 'paybox', 'stripe'));
 					$servicename = $langs->transnoentities('Online');
+
 					$paiement_url = getOnlinePaymentUrl(0, 'invoice', $object->ref, 0, '', 0);
 					$linktopay = $langs->trans("ToOfferALinkForOnlinePayment", $servicename).' <a href="'.$paiement_url.'">'.$outputlangs->transnoentities("ClickHere").'</a>';