diff --git a/htdocs/bom/class/bom.class.php b/htdocs/bom/class/bom.class.php
index 5ef0a9acf22..0ba39eef43b 100644
--- a/htdocs/bom/class/bom.class.php
+++ b/htdocs/bom/class/bom.class.php
@@ -1444,7 +1444,7 @@ class BOM extends CommonObject
 						}
 
 						$unit_cost = (float) (is_null($tmpproduct->cost_price) ? $tmpproduct->pmp : $tmpproduct->cost_price);
-						if (empty($unit_cost)) {
+						if (empty($unit_cost)) {	// @phpstan-ignore-line phpstan thinks this is always false. No,if unit_cost is 0, it is not.
 							if ($productFournisseur->find_min_price_product_fournisseur($line->fk_product) > 0) {
 								if ($productFournisseur->fourn_remise_percent != "0") {
 									$line->unit_cost = $productFournisseur->fourn_unitprice_with_discount;