diff --git a/program/lib/Roundcube/rcube_imap_generic.php b/program/lib/Roundcube/rcube_imap_generic.php
index 473794844..9a033660e 100644
--- a/program/lib/Roundcube/rcube_imap_generic.php
+++ b/program/lib/Roundcube/rcube_imap_generic.php
@@ -1505,6 +1505,7 @@ class rcube_imap_generic
             $mailbox = '*';
         }
 
+        $lstatus = false;
         $args = array();
         $rets = array();