diff --git a/src/_includes/partials/main-nav.njk b/src/_includes/partials/main-nav.njk
index 0397041..73ade9b 100644
--- a/src/_includes/partials/main-nav.njk
+++ b/src/_includes/partials/main-nav.njk
@@ -33,7 +33,7 @@
   <!-- see also: https://kittygiraudel.com/2022/09/30/templating-in-html/ -->
 
   <template id="burger-template">
-    <button type="button" aria-expanded="false" aria-controls="mainnav">
+    <button type="button" aria-expanded="false" aria-controls="mainnav" class="cluster">
       <span>{{ meta.navigation.navLabel }}</span>
 
       <svg