diff --git a/grade/edit/tree/lib.php b/grade/edit/tree/lib.php
index 8bd7f2c4046..fb3bec65183 100755
--- a/grade/edit/tree/lib.php
+++ b/grade/edit/tree/lib.php
@@ -902,7 +902,7 @@ class grade_edit_tree_column_aggregateoutcomes extends grade_edit_tree_column_ca
         $headercell = clone($this->headercell);
         $headercell->style .= 'width: 40px;';
         $headercell->text = get_string('aggregateoutcomes', 'grades')
-              .$OUTPUT->help_icon('aggregateoutcomes', 'grade');
+              .$OUTPUT->help_icon('aggregateoutcomes', 'grades');
         return $headercell;
     }