diff --git a/source/_patterns/03-layouts/content/content.twig b/source/_patterns/03-layouts/content/content.twig
index 7d5b641194ddd33f0f96da6828f3ab8a2318255e..88d2d7f62d9f7e4e49feebeccc66f46af58e5c53 100644
--- a/source/_patterns/03-layouts/content/content.twig
+++ b/source/_patterns/03-layouts/content/content.twig
@@ -1,5 +1,11 @@
-<main id="main" class="uw-main" role="main" tabindex="-1">
+{% set main_classes = 'uw-main' %}
 
-    {% block content %}
+{% for class in classes %}
+  {% set main_classes = main_classes ~ ' ' ~ class %}
+{% endfor %}
+
+<main id="main" class="{{ main_classes }}" role="main" tabindex="-1">
+  {% block content %}
+    Main content
   {% endblock %}
 </main>