diff --git a/grade/import/grade_import_form.php b/grade/import/grade_import_form.php
index 99a15ed..cb6d918 100755
--- a/grade/import/grade_import_form.php
+++ b/grade/import/grade_import_form.php
@@ -93,8 +93,8 @@ class grade_import_mapping_form extends moodleform {
 
         // add a comment option
 
+        $comments = array();
         if ($gradeitems = $this->_customdata['gradeitems']) {
-            $comments = array();
             foreach ($gradeitems as $itemid => $itemname) {
                 $comments['feedback_'.$itemid] = 'comments for '.$itemname;
             }