diff --git a/htdocs/mrp/mo_production.php b/htdocs/mrp/mo_production.php
index 64ae11909ef..7bff43bfc7b 100644
--- a/htdocs/mrp/mo_production.php
+++ b/htdocs/mrp/mo_production.php
@@ -220,7 +220,7 @@ if (empty($reshook)) {
 							if ($qtytoprocess >= 0) {
 								$idstockmove = $stockmove->livraison($user, $line->fk_product, GETPOST('idwarehouse-'.$line->id.'-'.$i), $qtytoprocess, 0, $labelmovement, dol_now(), '', '', GETPOST('batch-'.$line->id.'-'.$i), $id_product_batch, $codemovement);
 							} else {
-								$idstockmove = $stockmove->reception($user, $line->fk_product, GETPOST('idwarehouse-'.$line->id.'-'.$i), $qtytoprocess, 0, $labelmovement, dol_now(), '', '', GETPOST('batch-'.$line->id.'-'.$i), $id_product_batch, $codemovement);
+								$idstockmove = $stockmove->reception($user, $line->fk_product, GETPOST('idwarehouse-'.$line->id.'-'.$i), $qtytoprocess * -1, 0, $labelmovement, dol_now(), '', '', GETPOST('batch-'.$line->id.'-'.$i), $id_product_batch, $codemovement);
 							}
 							if ($idstockmove < 0) {
 								$error++;