diff --git a/grade/report/grader/module.js b/grade/report/grader/module.js
index f17cbcfb9e9..a3c1698dbc1 100644
--- a/grade/report/grader/module.js
+++ b/grade/report/grader/module.js
@@ -122,7 +122,7 @@ M.gradereport_grader.classes.report = function(Y, id, cfg, items, users, feedbac
     // node iteration
     this.table.all('tr').each(function(tr){
         // Check it is a user row
-        if (tr.getAttribute('id').match(/^fixed_user_(\d+)$/)) {
+        if (tr.getAttribute('id').match(/^(fixed_)?user_(\d+)$/)) {
             // Highlight rows
             tr.all('th.cell').on('click', this.table_highlight_row, this, tr);
             // Display tooltips