diff --git a/htdocs/core/modules/commande/doc/pdf_eratosthene.modules.php b/htdocs/core/modules/commande/doc/pdf_eratosthene.modules.php
index 131e159196b..c8196d41a63 100644
--- a/htdocs/core/modules/commande/doc/pdf_eratosthene.modules.php
+++ b/htdocs/core/modules/commande/doc/pdf_eratosthene.modules.php
@@ -271,7 +271,7 @@ class pdf_eratosthene extends ModelePDFCommandes
 						}
 
 						foreach ($objphoto->liste_photos($dir, 1) as $key => $obj) {
-							if (empty($conf->global->CAT_HIGH_QUALITY_IMAGES)) {		// If CAT_HIGH_QUALITY_IMAGES not defined, we use thumb if defined and then original photo
+							if (!getDolGlobalInt('CAT_HIGH_QUALITY_IMAGES')) {		// If CAT_HIGH_QUALITY_IMAGES not defined, we use thumb if defined and then original photo
 								if ($obj['photo_vignette']) {
 									$filename = $obj['photo_vignette'];
 								} else {