diff --git a/grade/edit/tree/grade_form.php b/grade/edit/tree/grade_form.php
index a1842265319..28355e2f869 100644
--- a/grade/edit/tree/grade_form.php
+++ b/grade/edit/tree/grade_form.php
@@ -80,7 +80,7 @@ class edit_grade_form extends moodleform {
             }
 
             $mform->addElement('select', 'finalgrade', get_string('finalgrade', 'grades'), $scaleopt);
-            $mform->addHelpButton('finalgrade', 'finalgrade', 'finalgrade');
+            $mform->addHelpButton('finalgrade', 'finalgrade', 'grades');
             $mform->disabledIf('finalgrade', 'overridden', 'notchecked');
         }