diff --git a/admin/settings/grades.php b/admin/settings/grades.php
index a141bae9992..ac902c48d76 100644
--- a/admin/settings/grades.php
+++ b/admin/settings/grades.php
@@ -162,7 +162,7 @@ if (has_capability('moodle/grade:manage', $systemcontext)
 
     $scales = new admin_externalpage('scales', get_string('scales'), $CFG->wwwroot.'/grade/edit/scale/index.php', 'moodle/grade:manage');
     $ADMIN->add('grades', $scales);
-    if ($CFG->enableoutcomes) {
+    if (!empty($CFG->enableoutcomes)) {
         $outcomes = new admin_externalpage('outcomes', get_string('outcomes', 'grades'), $CFG->wwwroot.'/grade/edit/outcome/index.php', 'moodle/grade:manage');
         $ADMIN->add('grades', $outcomes);
     }