diff --git a/layouts/partials/header.html b/layouts/partials/header.html
index cc63659..1ca0a82 100644
--- a/layouts/partials/header.html
+++ b/layouts/partials/header.html
@@ -108,7 +108,7 @@
             <li>
                 <a href="{{ .URL | absLangURL }}" title="{{ .Title | default .Name }} {{- cond $is_search (" (Alt + /)" | safeHTMLAttr) ("" | safeHTMLAttr ) }}"
                 {{- cond $is_search (" accesskey=/" | safeHTMLAttr) ("" | safeHTMLAttr ) }}>
-                    <span {{- if eq $menu_item_url $page_url }} class="active" {{- end }}>
+                    <span {{- if hasPrefix $page_url $menu_item_url }} class="active" {{- end }}>
                         {{- .Pre }}
                         {{- .Name -}}
                         {{ .Post -}}