diff --git a/htdocs/compta/facture/class/facture.class.php b/htdocs/compta/facture/class/facture.class.php
index 1c9db467dcf..49a102b21a1 100644
--- a/htdocs/compta/facture/class/facture.class.php
+++ b/htdocs/compta/facture/class/facture.class.php
@@ -1824,7 +1824,7 @@ class Facture extends CommonInvoice
                         $mouvP = new MouvementStock($this->db);
                         // We decrease stock for product
                         if ($this->type == 2) $result=$mouvP->livraison($user, $this->lines[$i]->fk_product, $idwarehouse, $this->lines[$i]->qty, $this->lines[$i]->subprice, $langs->trans("InvoiceBackToDraftInDolibarr",$this->ref));
-                        else $result=$mouvP->reception($user, $this->lines[$i]->fk_product, $idwarehouse, $this->lines[$i]->qty, $this->lines[$i]->subprice, $langs->trans("InvoiceBackToDraftInDolibarr",$this->ref));
+                        else $result=$mouvP->reception($user, $this->lines[$i]->fk_product, $idwarehouse, $this->lines[$i]->qty, 0, $langs->trans("InvoiceBackToDraftInDolibarr",$this->ref));	// we use 0 for price, to not change the weighted average value
                     }
                 }
             }