--- virtual_site.module.orig	2011-06-07 14:10:55.000000000 +0100
+++ virtual_site.module	2011-06-07 14:13:15.000000000 +0100
@@ -200,7 +200,8 @@
 function virtual_site_load_active() {
 	static $active;
 
-	if (!is_object($active)) {
+	if (!isset($active)) {
+    $active = false;
 		$sites = virtual_site_load();
 
 		foreach ($sites as $site) {