diff --git a/htdocs/core/modules/delivery/doc/pdf_storm.modules.php b/htdocs/core/modules/delivery/doc/pdf_storm.modules.php
index 46a70464583..3db75e6ca9b 100644
--- a/htdocs/core/modules/delivery/doc/pdf_storm.modules.php
+++ b/htdocs/core/modules/delivery/doc/pdf_storm.modules.php
@@ -752,8 +752,8 @@ class pdf_storm extends ModelePDFDeliveryOrder
 		pdf_pagehead($pdf, $outputlangs, $this->page_hauteur);
 
 		// Show Draft Watermark
-		if ($object->statut == 0 && (!empty($conf->global->COMMANDE_DRAFT_WATERMARK))) {
-			pdf_watermark($pdf, $outputlangs, $this->page_hauteur, $this->page_largeur, 'mm', $conf->global->COMMANDE_DRAFT_WATERMARK);
+		if ($object->statut == 0 && getDolGlobalString('COMMANDE_DRAFT_WATERMARK')) {
+			pdf_watermark($pdf, $outputlangs, $this->page_hauteur, $this->page_largeur, 'mm', getDolGlobalString('COMMANDE_DRAFT_WATERMARK'));
 		}
 
 		$pdf->SetTextColor(0, 0, 60);