diff --git a/Rakefile b/Rakefile
index 49b323af..1ce55ac6 100644
--- a/Rakefile
+++ b/Rakefile
@@ -101,6 +101,7 @@ end
 
 ASSETS_PATH = "lib/rdoc/generator/template/rails/resources"
 
+desc "Download and vendor JavaScript assets"
 task :vendor_javascript do
   module Importmap; end
   require "importmap/packager"