diff --git a/question/type/calculated/questiontype.php b/question/type/calculated/questiontype.php
index 14a370bbded..e464b793563 100644
--- a/question/type/calculated/questiontype.php
+++ b/question/type/calculated/questiontype.php
@@ -699,7 +699,6 @@ class question_calculated_qtype extends question_dataset_dependent_questiontype
 
     function comment_header($question) {
         //$this->get_question_options($question);
-        global $SESSION;
         $strheader = '';
         $delimiter = '';