diff --git a/files/templates/default.html b/files/templates/default.html
index 1e4bf5e9b..213412563 100644
--- a/files/templates/default.html
+++ b/files/templates/default.html
@@ -276,7 +276,7 @@
 				{% set banner = 'cached.webp' | asset_siteimg %}
 			{% endif %}
 			<a href="{{banner}}">
-				<img alt="site banner" src="{{banner}}" width="100%">
+				<img alt="site banner" onclick="expandDesktopImage()" src="{{banner}}" width="100%">
 			</a>
 		{% else %}
 			{% if SITE_NAME == 'PCM' %}