diff --git a/install-dev/upgrade/php/p15015_blockadvertising_extension.php b/install-dev/upgrade/php/p15015_blockadvertising_extension.php
new file mode 100644
index 000000000..580d718d9
--- /dev/null
+++ b/install-dev/upgrade/php/p15015_blockadvertising_extension.php
@@ -0,0 +1,36 @@
+<?php
+/*
+* 2007-2012 PrestaShop
+*
+* NOTICE OF LICENSE
+*
+* This source file is subject to the Open Software License (OSL 3.0)
+* that is bundled with this package in the file LICENSE.txt.
+* It is also available through the world-wide-web at this URL:
+* http://opensource.org/licenses/osl-3.0.php
+* If you did not receive a copy of the license and are unable to
+* obtain it through the world-wide-web, please send an email
+* to license@prestashop.com so we can send you a copy immediately.
+*
+* DISCLAIMER
+*
+* Do not edit or add to this file if you wish to upgrade PrestaShop to newer
+* versions in the future. If you wish to customize PrestaShop for your
+* needs please refer to http://www.prestashop.com for more information.
+*
+*  @author PrestaShop SA <contact@prestashop.com>
+*  @copyright  2007-2012 PrestaShop SA
+*  @version  Release: $Revision: 15469 $
+*  @license    http://opensource.org/licenses/osl-3.0.php  Open Software License (OSL 3.0)
+*  International Registered Trademark & Property of PrestaShop SA
+*/
+
+function p15015_blockadvertising_extension()
+{
+	// Try to update with the extension of the image that exists in the module directory
+	if (file_exists(_PS_MODULE_DIR_.'blockadvertising'))
+		foreach (scandir(_PS_MODULE_DIR_.'blockadvertising') as $file)
+			if (in_array($file, array('advertising.jpg', 'advertising.gif', 'advertising.png')))
+				Configuration::updateGlobalValue('BLOCKADVERT_IMG_EXT', substr($file, strrpos($file, '.') + 1));
+	return true;
+}
\ No newline at end of file
diff --git a/install-dev/upgrade/sql/1.5.0.15.sql b/install-dev/upgrade/sql/1.5.0.15.sql
new file mode 100644
index 000000000..ec7f8de82
--- /dev/null
+++ b/install-dev/upgrade/sql/1.5.0.15.sql
@@ -0,0 +1,5 @@
+SET NAMES 'utf8';
+
+/* PHP:p15015_blockadvertising_extension(); */;
+
+