diff --git a/views/components/Base.js b/views/components/Base.js
index ec65890..2d0b574 100644
--- a/views/components/Base.js
+++ b/views/components/Base.js
@@ -25,7 +25,7 @@ const Header = ({ currentUrl }) => {
                 <${Link}
                   class=${tw(
                     linkClasses,
-                    currentUrl.startsWith?.(href) && 'font-bold'
+                    currentUrl && currentUrl.startsWith(href) && 'font-bold'
                   )}
                   href=${href}
                 >