diff --git a/lib/Froxlor/Api/Commands/Customers.php b/lib/Froxlor/Api/Commands/Customers.php
index 5a1d63d2..1f5bba68 100644
--- a/lib/Froxlor/Api/Commands/Customers.php
+++ b/lib/Froxlor/Api/Commands/Customers.php
@@ -1669,7 +1669,7 @@ class Customers extends \Froxlor\Api\ApiCommand implements \Froxlor\Api\Resource
 	 * @param string $extra
 	 *        	optional, default empty
 	 * @param int $increase_by
-	 *              optional, default 1
+	 *        	optional, default 1
 	 */
 	public static function increaseUsage($customerid = 0, $resource = null, $extra = '', $increase_by = 1)
 	{
@@ -1684,7 +1684,7 @@ class Customers extends \Froxlor\Api\ApiCommand implements \Froxlor\Api\Resource
 	 * @param string $extra
 	 *        	optional, default empty
 	 * @param int $decrease_by
-	 *              optional, default 1
+	 *        	optional, default 1
 	 */
 	public static function decreaseUsage($customerid = 0, $resource = null, $extra = '', $decrease_by = 1)
 	{
diff --git a/lib/Froxlor/Dns/DnsEntry.php b/lib/Froxlor/Dns/DnsEntry.php
index 4a678d05..6d388ac1 100644
--- a/lib/Froxlor/Dns/DnsEntry.php
+++ b/lib/Froxlor/Dns/DnsEntry.php
@@ -32,13 +32,13 @@ class DnsEntry
 
 	public $content;
 
-	public function __construct($record = '', $type = 'A', $content = null, $prio = 0, $ttl = 18000, $class = 'IN')
+	public function __construct($record = '', $type = 'A', $content = null, $prio = 0, $ttl = 0, $class = 'IN')
 	{
 		$this->record = $record;
 		$this->type = $type;
 		$this->content = $content;
 		$this->priority = $prio;
-		$this->ttl = $ttl;
+		$this->ttl = ($ttl <= 0 ? Settings::Get('system.defaultttl') : $ttl);
 		$this->class = $class;
 	}
 
diff --git a/lib/Froxlor/Dns/DnsZone.php b/lib/Froxlor/Dns/DnsZone.php
index c3b2b088..863b56f2 100644
--- a/lib/Froxlor/Dns/DnsZone.php
+++ b/lib/Froxlor/Dns/DnsZone.php
@@ -1,6 +1,8 @@
 <?php
 namespace Froxlor\Dns;
 
+use Froxlor\Settings;
+
 /**
  * This file is part of the Froxlor project.
  * Copyright (c) 2016 the Froxlor Team (see authors).
@@ -26,9 +28,9 @@ class DnsZone
 
 	public $records;
 
-	public function __construct($ttl = 18000, $origin = '', $serial = '', $records = null)
+	public function __construct($ttl = 0, $origin = '', $serial = '', $records = null)
 	{
-		$this->ttl = $ttl;
+		$this->ttl = ($ttl <= 0 ? Settings::Get('system.defaultttl') : $ttl);
 		$this->origin = $origin;
 		$this->serial = $serial;
 		$this->records = $records;