Problems with Child Category targeting in a header

Hi all,

I want to display a specific category logo inside my header.php file. However it doesn’t seem to be displaying.

It’s a child category of a parent category “blogs”…

Any help would be greatly appreciated.

<?php if ( in_category( 3160 ) ) {  ?>
				<a href="<?php bloginfo('siteurl'); ?>/category/blogs/nat-sec-2016/"><img src="<?php bloginfo('siteurl'); ?>/wp-content/uploads/2015/09/NatSec2016.jpg" alt="#NatSec2016" width="330"></a> } else { };