diff --git a/main.go b/main.go
index b9d9c96c..201e38fe 100644
--- a/main.go
+++ b/main.go
@@ -50,6 +50,7 @@ func main() {
 	flagSet.String("google-admin-email", "", "the google admin to impersonate for api calls")
 	flagSet.String("google-service-account-json", "", "the path to the service account json credentials")
 	flagSet.String("client-id", "", "the OAuth Client ID: ie: \"123456.apps.googleusercontent.com\"")
+	flagSet.String("audience-client-id", "", "the OAuth Audience Client ID: ie: \"123456.apps.googleusercontent.com\"")
 	flagSet.String("client-secret", "", "the OAuth Client Secret")
 	flagSet.String("authenticated-emails-file", "", "authenticate against emails via file (one per line)")
 	flagSet.String("htpasswd-file", "", "additionally authenticate against a htpasswd file. Entries must be created with \"htpasswd -s\" for SHA encryption")