diff --git a/program/steps/settings/manage_folders.inc b/program/steps/settings/manage_folders.inc
index 4759dd295..8dd898d26 100644
--- a/program/steps/settings/manage_folders.inc
+++ b/program/steps/settings/manage_folders.inc
@@ -95,7 +95,7 @@ else if ($_action=='rename-folder')
 // delete an existing IMAP mailbox
 else if ($_action=='delete-folder')
   {
-  if (get_input_value('_mboxes', RCUBE_INPUT_GET))
+  if ($mboxes = get_input_value('_mboxes', RCUBE_INPUT_GET))
     $deleted = $IMAP->delete_mailbox(array($mboxes));
 
   if ($REMOTE_REQUEST && $deleted)