diff --git a/layouts/partials/docs/menu-bundle.html b/layouts/partials/docs/menu-bundle.html
index ddaac52..9927923 100644
--- a/layouts/partials/docs/menu-bundle.html
+++ b/layouts/partials/docs/menu-bundle.html
@@ -1,4 +1,5 @@
 {{ with .Site.GetPage .Site.Params.BookMenuBundle }}
   {{- $href := printf "href=\"%s\"" $.RelPermalink -}}
   {{- replace .Content $href (print $href "class=active") | safeHTML -}}
+  {{- warnf "Bundle menu mode is deprecated and will be removed" -}}
 {{ end }}