example of the code i used in my header.PHP to add it to my nav
<?php wp_nav_menu( array( 'theme_location' => 'primary', 'menu_class' => 'nav-menu' ) ); ?>
<div align="right">
<li id="menu-item-5839" class="rss menu-item menu-item-type-custom menu-item-object-custom menu-item-5839 has-image"><a href="mailto:info@AshleyMarietta.com"><img width="21" height="21" src="http://cdn2.galadarling.com/wp-content/uploads/2014/03/gd-nav-em.png" class="attachment-full wp-post-image" alt="EMAIL" title="EMAIL" /></a></li>
</nav><!-- #site-navigation -->