diff --git a/htdocs/product/composition/card.php b/htdocs/product/composition/card.php
index 9a1fa1adf69..6dd6a0ac89d 100644
--- a/htdocs/product/composition/card.php
+++ b/htdocs/product/composition/card.php
@@ -167,18 +167,18 @@ if ($action == 'search') {
 }
 
 $title = $langs->trans('ProductServiceCard');
-$helpurl = '';
+$help_url = '';
 $shortlabel = dol_trunc($object->label, 16);
 if (GETPOST("type") == '0' || ($object->type == Product::TYPE_PRODUCT)) {
 	$title = $langs->trans('Product')." ".$shortlabel." - ".$langs->trans('AssociatedProducts');
-	$helpurl = 'EN:Module_Products|FR:Module_Produits|ES:Módulo_Productos';
+	$help_url = 'EN:Module_Products|FR:Module_Produits|ES:Módulo_Productos';
 }
 if (GETPOST("type") == '1' || ($object->type == Product::TYPE_SERVICE)) {
 	$title = $langs->trans('Service')." ".$shortlabel." - ".$langs->trans('AssociatedProducts');
-	$helpurl = 'EN:Module_Services_En|FR:Module_Services|ES:Módulo_Servicios';
+	$help_url = 'EN:Module_Services_En|FR:Module_Services|ES:Módulo_Servicios';
 }
 
-llxHeader('', $title, $helpurl);
+llxHeader('', $title, $help_url);
 
 $head = product_prepare_head($object);
 $titre = $langs->trans("CardProduct".$object->type);