diff --git a/files/templates/header.html b/files/templates/header.html
index a83537118..ab82ac9c4 100644
--- a/files/templates/header.html
+++ b/files/templates/header.html
@@ -65,7 +65,7 @@
 				{% if SITE_NAME == 'WPD' %} {# Temporary event code, 2022-12-11 #}
 					{% set icon_url = 'icons-event/2022-christmas.webp' | asset_siteimg %}
 				{% elif HOLIDAY_EVENT %}
-					{% set icon_url = random_image('events/icon') %}
+					{% set icon_url = macros.random_image('events/icon') %}
 				{% else %}
 					{% set icon_url = 'headericon.webp' | asset_siteimg %}
 				{% endif %}