diff --git a/htdocs/product/class/product.class.php b/htdocs/product/class/product.class.php
index a61406c90d7..266ae301de9 100644
--- a/htdocs/product/class/product.class.php
+++ b/htdocs/product/class/product.class.php
@@ -12,7 +12,7 @@
  * Copyright (C) 2014		Henry Florian			<florian.henry@open-concept.pro>
  * Copyright (C) 2014-2016	Philippe Grand			<philippe.grand@atoo-net.com>
  * Copyright (C) 2014		Ion agorria			    <ion@agorria.com>
- * Copyright (C) 2016		Ferran Marcet			<fmarcet@2byte.es>
+ * Copyright (C) 2016-2017	Ferran Marcet			<fmarcet@2byte.es>
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -816,7 +816,7 @@ class Product extends CommonObject
                     // End call triggers
 				}
 
-				if (! $error && (is_object($this->oldcopy) && $this->oldcopy->ref != $this->ref))
+				if (! $error && (is_object($this->oldcopy) && $this->oldcopy->ref !== $this->ref))
 				{
 					// We remove directory
 					if ($conf->product->dir_output)
diff --git a/htdocs/projet/class/project.class.php b/htdocs/projet/class/project.class.php
index b242f7d6b06..07727032c39 100644
--- a/htdocs/projet/class/project.class.php
+++ b/htdocs/projet/class/project.class.php
@@ -4,6 +4,7 @@
  * Copyright (C) 2005-2010 Regis Houssin        <regis.houssin@capnetworks.com>
  * Copyright (C) 2013	   Florian Henry        <florian.henry@open-concept.pro>
  * Copyright (C) 2014-2015 Marcos García        <marcosgdf@gmail.com>
+ * Copyright (C) 2017      Ferran Marcet        <fmarcet@2byte.es>
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -301,7 +302,7 @@ class Project extends CommonObject
                 	}
                 }
 
-                if (! $error && (is_object($this->oldcopy) && $this->oldcopy->ref != $this->ref))
+                if (! $error && (is_object($this->oldcopy) && $this->oldcopy->ref !== $this->ref))
                 {
                 	// We remove directory
                 	if ($conf->projet->dir_output)