diff --git a/htdocs/fourn/class/fournisseur.product.class.php b/htdocs/fourn/class/fournisseur.product.class.php
index 786a650efb3..4dbd2365c6f 100644
--- a/htdocs/fourn/class/fournisseur.product.class.php
+++ b/htdocs/fourn/class/fournisseur.product.class.php
@@ -391,7 +391,6 @@ class ProductFournisseur extends Product
 				return -2;
 			}
         }
-
         else
         {
             dol_syslog(get_class($this) . '::update_buyprice without knowing id of line, so we delete from company, quantity and supplier_ref and insert again', LOG_DEBUG);
@@ -434,11 +433,11 @@ class ProductFournisseur extends Product
                 $sql .= (empty($fk_barcode_type) ? 'NULL' : "'" . $this->db->escape($fk_barcode_type) . "'");
                 $sql .= ")";
 
-                $idinserted = 0;
-
+				$this->product_fourn_price_id = 0;
+					
                 $resql = $this->db->query($sql);
                 if ($resql) {
-                    $idinserted = $this->db->last_insert_id(MAIN_DB_PREFIX . "product_fournisseur_price");
+                    $this->product_fourn_price_id = $this->db->last_insert_id(MAIN_DB_PREFIX . "product_fournisseur_price");
                 }
                 else {
                     $error++;
@@ -446,6 +445,7 @@ class ProductFournisseur extends Product
 
                 if (! $error && empty($conf->global->PRODUCT_PRICE_SUPPLIER_NO_LOG)) {
                     // Add record into log table
+					// $this->product_fourn_price_id must be set
                     $result = $this->logPrice($user, $now, $buyprice, $qty, $multicurrency_buyprice, $multicurrency_unitBuyPrice, $multicurrency_tx, $fk_multicurrenc, $multicurrency_code);
                     if ($result < 0) {
                         $error++;
@@ -461,7 +461,6 @@ class ProductFournisseur extends Product
 
                     if (empty($error)) {
                         $this->db->commit();
-						$this->product_fourn_price_id = $idinserted;
                         return $this->product_fourn_price_id;
                     } else {
                         $this->db->rollback();