diff --git a/backup.php b/backup.php
index 06fa7b41..6687f642 100644
--- a/backup.php
+++ b/backup.php
@@ -75,6 +75,7 @@ if ($_SERVER['REQUEST_METHOD'] == "GET")
       $tables = array(
          'admin',
          'alias',
+         'alias_domain',
          'config',
          'domain',
          'domain_admins',
diff --git a/config.inc.php b/config.inc.php
index 0a7ca85b..3f2a5610 100644
--- a/config.inc.php
+++ b/config.inc.php
@@ -59,6 +59,7 @@ $CONF['database_prefix'] = '';
 $CONF['database_tables'] = array (
     'admin' => 'admin',
     'alias' => 'alias',
+    'alias_domain' => 'alias_domain',
     'config' => 'config',
     'domain' => 'domain',
     'domain_admins' => 'domain_admins',