diff --git a/lam/lib/modules/shadowAccount.inc b/lam/lib/modules/shadowAccount.inc
index fd5b1a71..72a34891 100644
--- a/lam/lib/modules/shadowAccount.inc
+++ b/lam/lib/modules/shadowAccount.inc
@@ -4,7 +4,7 @@ $Id$
 
   This code is part of LDAP Account Manager (http://www.ldap-account-manager.org/)
   Copyright (C) 2003 - 2006  Tilo Lutz
-  Copyright (C) 2007 - 2015  Roland Gruber
+  Copyright (C) 2007 - 2016  Roland Gruber
 
   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
@@ -778,7 +778,7 @@ class shadowAccount extends baseModule implements passwordService {
 
 }
 
-if (interface_exists('\LAM\JOB\Job')) {
+if (interface_exists('\LAM\JOB\Job', false)) {
 
 	include_once dirname(__FILE__) . '/../passwordExpirationJob.inc';
 
diff --git a/lam/lib/modules/windowsUser.inc b/lam/lib/modules/windowsUser.inc
index 5b87b9f9..a747a1ce 100644
--- a/lam/lib/modules/windowsUser.inc
+++ b/lam/lib/modules/windowsUser.inc
@@ -3153,7 +3153,7 @@ class windowsUser extends baseModule implements passwordService {
 
 }
 
-if (interface_exists('\LAM\JOB\Job')) {
+if (interface_exists('\LAM\JOB\Job', false)) {
 
 	include_once dirname(__FILE__) . '/../passwordExpirationJob.inc';