diff --git a/gulp.d/tasks/release.js b/gulp.d/tasks/release.js
index ef38f72..ef54d09 100644
--- a/gulp.d/tasks/release.js
+++ b/gulp.d/tasks/release.js
@@ -75,9 +75,9 @@ function addVersionEntry (file, tagName, contents = Buffer.alloc(0)) {
   return file
 }
 
-module.exports = (dest, bundleName, owner, repo, ref = 'refs/heads/main', token, updateBranch) => async () => {
+module.exports = (dest, bundleName, owner, repo, ref, token, updateBranch) => async () => {
   const octokit = new Octokit({ auth: `token ${token}` })
-  let variant = ref.replace(/^refs\/heads\//, '')
+  let variant = ref ? ref.replace(/^refs\/heads\//, '') : 'main'
   if (variant === 'main') variant = 'prod'
   ref = ref.replace(/^refs\//, '')
   const tagName = `${variant}-${await getNextReleaseNumber({ octokit, owner, repo, variant })}`