diff --git a/htdocs/mrp/mo_production.php b/htdocs/mrp/mo_production.php
index 56075474813..5837880f1e8 100644
--- a/htdocs/mrp/mo_production.php
+++ b/htdocs/mrp/mo_production.php
@@ -391,7 +391,7 @@ if (empty($reshook)) {
 							$moline->batch = GETPOST('batchtoproduce-'.$line->id.'-'.$i);
 							$moline->role = 'produced';
 							$moline->fk_mrp_production = $line->id;
-							$moline->fk_stock_movement = $idstockmove == 0 ? null : $idstockmove;
+							$moline->fk_stock_movement = (($idstockmove == 0) ? null : $idstockmove);
 							$moline->fk_user_creat = $user->id;
 
 							$resultmoline = $moline->create($user);