diff --git a/content/components/underline-nav.mdx b/content/components/underline-nav.mdx
new file mode 100644
index 0000000000000000000000000000000000000000..80f0c22cdcd8f8e283273a371491d097a79f8f34
--- /dev/null
+++ b/content/components/underline-nav.mdx
@@ -0,0 +1,4 @@
+---
+title: Underline nav
+status: Alpha
+---
diff --git a/src/@primer/gatsby-theme-doctocat/nav.yml b/src/@primer/gatsby-theme-doctocat/nav.yml
index 012ae20fc98c1ef30985f6f14a0f96dda07dbf00..ed8d1fc564923a3a19af621f0a4c19e2d4e1252f 100644
--- a/src/@primer/gatsby-theme-doctocat/nav.yml
+++ b/src/@primer/gatsby-theme-doctocat/nav.yml
@@ -74,6 +74,8 @@
       url: /components/tokens
     - title: Tree view
       url: /components/treeview
+    - title: Underline nav
+      url: /components/underline-nav
 - title: Design tools
   url: /tools
   children: