diff --git a/grade/report/overview/lib.php b/grade/report/overview/lib.php
index 90ca93def3eda..c4efb4543678c 100644
--- a/grade/report/overview/lib.php
+++ b/grade/report/overview/lib.php
@@ -249,7 +249,7 @@ function grade_report_overview_settings_definition(&$mform) {
                       0 => get_string('hide'),
                       1 => get_string('show'));
 
-    if (empty($CFG->grade_overviewreport_showrank)) {
+    if (empty($CFG->grade_report_overview_showrank)) {
         $options[-1] = get_string('defaultprev', 'grades', $options[0]);
     } else {
         $options[-1] = get_string('defaultprev', 'grades', $options[1]);