diff --git a/install-dev/preactivation.php b/install-dev/preactivation.php
index 23d976022..5c0a334a9 100644
--- a/install-dev/preactivation.php
+++ b/install-dev/preactivation.php
@@ -5,9 +5,9 @@
 		$_GET['language'] = 0;
 	function getPreinstallXmlLang($object, $field)
 	{
-		if (ToolsCore::property_exists($object, $field.'_'.((int)($_GET['language'])+1)))
+		if (property_exists($object, $field.'_'.((int)($_GET['language'])+1)))
 			return str_replace(array('!|', '|!'), array('<', '>'), trim($object->{$field.'_'.((int)($_GET['language'])+1)}));
-		if (ToolsCore::property_exists($object, $field.'_1'))
+		if (property_exists($object, $field.'_1'))
 			return str_replace(array('!|', '|!'), array('<', '>'), trim($object->{$field.'_1'}));
 		return '';
 	}