diff --git a/api/thumbnail.php b/api/thumbnail.php
index 330337b4f0..7294562a15 100644
--- a/api/thumbnail.php
+++ b/api/thumbnail.php
@@ -64,7 +64,7 @@ function get_app()
 	elseif (isset($_GET['path']))
 	{
 		@list(, $apps, $app) = explode('/', $_GET['path']);
-		if ($apps !== 'apps' || !isset($GLOBALS['egw_info']['user']['apps'][$app]))
+		if ($apps !== 'apps')
 		{
 			$app = 'filemanager';
 		}