diff --git a/htdocs/mrp/mo_production.php b/htdocs/mrp/mo_production.php
index bfa091a1400..fb0930deede 100644
--- a/htdocs/mrp/mo_production.php
+++ b/htdocs/mrp/mo_production.php
@@ -1007,6 +1007,9 @@ if ($object->id > 0 && (empty($action) || ($action != 'edit' && $action != 'crea
 							$disable = 'disabled';
 						}
 
+						// input hidden with fk_product of line
+						print '<input type="hidden" name="product-'.$line->id.'-'.$i.'" value="'.$line->fk_product.'">';
+
 						// Qty
 						print '<td class="right"><input type="text" class="width50 right" id="qtytoconsume-'.$line->id.'-'.$i.'" name="qty-'.$line->id.'-'.$i.'" value="'.$preselected.'" '.$disable.'></td>';