wp_list_pages exclude does not work

Hello

I have implemented the following code into my header.php

<div id="navmenu">
<ul>
 <li><a href="<?php echo get_settings('home'); ?>">START</a></li>
<?php $arguments = array('depth' => '1', 'title_li' => '', 'exclude=90');
wp_list_pages($arguments); ?>
</ul>
</div>

I am facing the problem that the exclude argument does not work, the page wie the corresponding ID is nevertheless displayed in the list.

EDIT: Resolved, had to be:

<?php $arguments = array('depth' => '1', 'title_li' => '', 'exclude' => '269');
wp_list_pages($arguments); ?>