diff --git a/src/layouts/base.njk b/src/layouts/base.njk
index c28cbdc..e6d7c2a 100644
--- a/src/layouts/base.njk
+++ b/src/layouts/base.njk
@@ -34,7 +34,7 @@
               listClass: "nav-list",
               anchorClass: "nav-link",
               activeAnchorClass: "active",
-              activeKey: eleventyNavigation.key
+              activeKey: eleventyNavigation.key or page.url.split('/')[1]
             }) |
             safe
           }}