diff --git a/src/navigation/underline-nav.scss b/src/navigation/underline-nav.scss
index 535f46b4..740c6cf0 100644
--- a/src/navigation/underline-nav.scss
+++ b/src/navigation/underline-nav.scss
@@ -17,6 +17,7 @@
   line-height: $lh-default;
   color: $text-gray;
   text-align: center;
+  border: none;
   // stylelint-disable-next-line primer/borders
   border-bottom: 2px $border-style transparent;