diff --git a/htdocs/product/class/product.class.php b/htdocs/product/class/product.class.php
index 9957641c13b..aa07673f5cc 100644
--- a/htdocs/product/class/product.class.php
+++ b/htdocs/product/class/product.class.php
@@ -2666,7 +2666,7 @@ class Product extends CommonObject
 				$obj = $this->db->fetch_object($result);
 				$this->stats_mo['customers_'.$role] = $obj->nb_customers ? $obj->nb_customers : 0;
 				$this->stats_mo['nb_'.$role] = $obj->nb ? $obj->nb : 0;
-				$this->stats_mo['qty_'.$role] = $obj->qty ? $obj->qty : 0;
+				$this->stats_mo['qty_'.$role] = $obj->qty ? price2num($obj->qty, 'MS') : 0;		// qty may be a float due to the SUM()
 			} else {
 				$this->error = $this->db->error();
 				$error++;
diff --git a/htdocs/product/stats/mo.php b/htdocs/product/stats/mo.php
index 3781d23699a..5a5c33312ca 100644
--- a/htdocs/product/stats/mo.php
+++ b/htdocs/product/stats/mo.php
@@ -1,6 +1,6 @@
 <?php
 /* Copyright (C) 2003-2007 Rodolphe Quiedeville <rodolphe@quiedeville.org>
- * Copyright (C) 2004-2009 Laurent Destailleur  <eldy@users.sourceforge.net>
+ * Copyright (C) 2004-2021 Laurent Destailleur  <eldy@users.sourceforge.net>
  * Copyright (C) 2005-2009 Regis Houssin        <regis.houssin@inodbox.com>
  *
  * This program is free software; you can redistribute it and/or modify