diff --git a/plugins/libkolab/lib/kolab_storage.php b/plugins/libkolab/lib/kolab_storage.php
index 983a268d..175bb027 100644
--- a/plugins/libkolab/lib/kolab_storage.php
+++ b/plugins/libkolab/lib/kolab_storage.php
@@ -92,7 +92,7 @@ class kolab_storage
      */
     public static function get_folder($folder)
     {
-        return self::setup() ? new kolab_storage_folder($folder, null, self::$imap) : null;
+        return self::setup() ? new kolab_storage_folder($folder, self::$imap) : null;
     }