diff --git a/export_rubric_scores.user.js b/export_rubric_scores.user.js
index 1da7320..0f25e32 100644
--- a/export_rubric_scores.user.js
+++ b/export_rubric_scores.user.js
@@ -158,6 +158,7 @@ defer(function () {
                             const enrollment = enrollments.find(i => i.user_id === submission.user_id);
                             if (enrollment && enrollment.user) {
                                 const user = enrollment.user;
+                                // can use ${user.id} if account does not use SIS
                                 let row = `${user.name},${user.sis_user_id},${submission.score},${submission.attempt}`;
 
                                 let crits = [];