diff --git a/htdocs/mrp/class/mo.class.php b/htdocs/mrp/class/mo.class.php
index 1fd60907763..65ba9597b8a 100644
--- a/htdocs/mrp/class/mo.class.php
+++ b/htdocs/mrp/class/mo.class.php
@@ -1,5 +1,6 @@
 <?php
 /* Copyright (C) 2017  Laurent Destailleur <eldy@users.sourceforge.net>
+ * Copyright (C) 2020  Lenin Rivas		   <lenin@leninrivas.com>
  * Copyright (C) ---Put here your own copyright and developer email---
  *
  * This program is free software; you can redistribute it and/or modify
@@ -590,7 +591,7 @@ class Mo extends CommonObject
 	}
 
 	/**
-	 * Erase and update the line to produce.
+	 * Erase and update the line to consume and to produce.
 	 *
 	 * @param  User $user      User that modifies
 	 * @param  bool $notrigger false=launch triggers after, true=disable triggers
@@ -648,7 +649,7 @@ class Mo extends CommonObject
 							if ($line->qty_frozen) {
 								$moline->qty = $line->qty; // Qty to consume does not depends on quantity to produce
 							} else {
-								$moline->qty = round($line->qty * $this->qty / $line->efficiency, 2);
+								$moline->qty = price2num(($line->qty / $bom->qty) * $this->qty / $line->efficiency, 'MS'); // Calculate with Qty to produce and  more presition
 							}
 							if ($moline->qty <= 0) {
 								$error++;