diff --git a/list-virtual.php b/list-virtual.php
index 7bbc09be..75565703 100644
--- a/list-virtual.php
+++ b/list-virtual.php
@@ -139,7 +139,7 @@ if ($result['rows'] > 0)
 
 if ($CONF['vacation_control_admin'] == 'YES')
 {
-   if ($CONF['used_quotas'] == 'YES')
+   if (boolconf('used_quotas'))
       $query = "SELECT $table_mailbox.*, $table_vacation.active AS v_active, $table_quota.current FROM $table_mailbox LEFT JOIN $table_vacation ON $table_mailbox.username=$table_vacation.email LEFT JOIN $table_quota ON $table_mailbox.username=$table_quota.username WHERE $table_mailbox.domain='$fDomain' AND $table_quota.path='quota/storage' ORDER BY $table_mailbox.username LIMIT $page_size OFFSET $fDisplay";
    else
       $query = "SELECT $table_mailbox.*, $table_vacation.active AS v_active FROM $table_mailbox LEFT JOIN $table_vacation ON $table_mailbox.username=$table_vacation.email WHERE $table_mailbox.domain='$fDomain' ORDER BY $table_mailbox.username LIMIT $page_size OFFSET $fDisplay";