diff --git a/modules/mailalerts/upgrade/install-2.5.php b/modules/mailalerts/upgrade/install-2.5.php
new file mode 100644
index 000000000..8696a4a2b
--- /dev/null
+++ b/modules/mailalerts/upgrade/install-2.5.php
@@ -0,0 +1,29 @@
+<?php
+
+if (!defined('_PS_VERSION_'))
+	exit;
+
+function upgrade_module_2_5($object)
+{
+	return Db::getInstance()->execute('
+		ALTER TABLE '._DB_PREFIX_.'mailalert_customer_oos 
+		ADD '.mailalerts_stripslashes_field('id_lang').' INT( 10 ) UNSIGNED NOT NULL , 
+		DROP PRIMARY KEY , 
+		ADD PRIMARY KEY ( 
+			'.mailalerts_stripslashes_field('id_customer').' , 
+			'.mailalerts_stripslashes_field('customer_email').' , 
+			'.mailalerts_stripslashes_field('id_product').' , 
+			'.mailalerts_stripslashes_field('id_product_attribute').' , 
+			'.mailalerts_stripslashes_field('id_shop').' 
+		)'
+	);
+}
+
+function mailalerts_stripslashes_field($field)
+{
+	$quotes = array('"\\\'"', '"\'"');
+	$dquotes = array('\'\\\\"\'', '\'"\'');
+	$backslashes = array('"\\\\\\\\"', '"\\\\"');
+
+	return '`'.bqSQL($field).'` = replace(replace(replace(`'.bqSQL($field).'`, '.$quotes[0].', '.$quotes[1].'), '.$dquotes[0].', '.$dquotes[1].'), '.$backslashes[0].', '.$backslashes[1].')';
+}
\ No newline at end of file