diff --git a/htdocs/product/list.php b/htdocs/product/list.php
index 91f4d123f09..4028726096a 100644
--- a/htdocs/product/list.php
+++ b/htdocs/product/list.php
@@ -1270,7 +1270,7 @@ if (!empty($arrayfields['p.duration']['checked'])) {
 	$totalarray['nbfield']++;
 }
 if (!empty($arrayfields['pac.fk_product_parent']['checked'])) {
-	print_liste_field_titre($arrayfields['pac.fk_product_parent']['label'], $_SERVER["PHP_SELF"], "pac.fk_product_parent", "", $param, '', $sortfield, $sortorder, '', $arrayfields['pac.fk_product_parent']['help']);
+	print_liste_field_titre($arrayfields['pac.fk_product_parent']['label'], $_SERVER["PHP_SELF"], "pac.fk_product_parent", "", $param, '', $sortfield, $sortorder, '', empty($arrayfields['pac.fk_product_parent']['help']) ? '' : $arrayfields['pac.fk_product_parent']['help']);
 }
 if (!empty($arrayfields['p.finished']['checked'])) {
 	print_liste_field_titre($arrayfields['p.finished']['label'], $_SERVER["PHP_SELF"], "p.finished", "", $param, '', $sortfield, $sortorder, 'center ');