diff --git a/apps/files_external/lib/google.php b/apps/files_external/lib/google.php
index 0e904dac45c9b877d5b49cf725597c3a23cece93..76ad1e4b0f6ff5e5c3ad5c75d64a14d81114280d 100644
--- a/apps/files_external/lib/google.php
+++ b/apps/files_external/lib/google.php
@@ -28,6 +28,7 @@ require_once 'Google/Service/Drive.php';
 
 class Google extends \OC\Files\Storage\Common {
 
+	private $client;
 	private $id;
 	private $service;
 	private $driveFiles;