diff --git a/bin/commands/generate.mjs b/bin/commands/generate.mjs
index d4586663..50ef3136 100644
--- a/bin/commands/generate.mjs
+++ b/bin/commands/generate.mjs
@@ -54,7 +54,7 @@ export default new Command('generate')
   )
   .addOption(new Option('-v, --version <semver>', 'Target Node.js version'))
   .addOption(new Option('-c, --changelog <url>', 'Changelog URL or path'))
-  .addOption(new Option('--git-ref', 'Git ref URL'))
+  .addOption(new Option('--git-ref <url>', 'Git ref URL'))
   .addOption(new Option('--index <url>', 'index.md URL or path'))
   .addOption(new Option('--minify', 'Minify?'))
   .addOption(new Option('--type-map <url>', 'Type map URL or path'))