diff --git a/htdocs/fourn/ajax/getSupplierPrices.php b/htdocs/fourn/ajax/getSupplierPrices.php
index 57874e3a122..211734f1129 100644
--- a/htdocs/fourn/ajax/getSupplierPrices.php
+++ b/htdocs/fourn/ajax/getSupplierPrices.php
@@ -86,7 +86,7 @@ if ($idprod > 0)
 
 	// Add price for costprice
 	$price=$producttmp->cost_price;
-	if (empty($price))
+	if (empty($price) && ! empty($conf->global->PRODUCT_USE_SUB_COST_PRICES_IF_COST_PRICE_EMPTY))
 	{
 		// get costprice for subproducts if any
 		$producttmp->get_sousproduits_arbo();