diff --git a/main/gradebook/lib/fe/displaygradebook.php b/main/gradebook/lib/fe/displaygradebook.php
index 3be23810a3..9f9bdffae7 100644
--- a/main/gradebook/lib/fe/displaygradebook.php
+++ b/main/gradebook/lib/fe/displaygradebook.php
@@ -32,7 +32,7 @@ class DisplayGradebook
 	* @param $forpdf only output for pdf file
 	*/
 	function display_header_result($evalobj, $selectcat, $shownavbar) {
-		if ($shownavbar == '1') {
+		if ($shownavbar == '1' && api_is_course_tutor()) {
 			$header= '<table border="0" cellpadding="5"><tr><td>';
 			$header .= '<a href="'.$_SESSION['gradebook_dest'].'?selectcat=' . $selectcat . '"><img src="../img/lp_leftarrow.gif" alt="' . get_lang('BackToOverview') . '" align="absmiddle"/> ' . get_lang('BackToOverview') . '</a></td>';
 			if ($evalobj->get_course_code() == null) {
diff --git a/main/gradebook/lib/fe/resulttable.class.php b/main/gradebook/lib/fe/resulttable.class.php
index dceb20983f..aeb712226f 100644
--- a/main/gradebook/lib/fe/resulttable.class.php
+++ b/main/gradebook/lib/fe/resulttable.class.php
@@ -140,7 +140,9 @@ class ResultTable extends SortableTable
 // Other functions
 
 	private function build_edit_column ($item) {
-		$edit_column = '<a href="' . api_get_self() . '?editres=' . $item['result_id'] . '&selecteval=' . $this->evaluation->get_id() . '"><img src="../img/edit.gif" border="0" title="' . get_lang('Modify') . '" alt="" /></a>';
+		if (api_is_course_tutor()) {//api_is_course_admin()
+			$edit_column = '<a href="' . api_get_self() . '?editres=' . $item['result_id'] . '&selecteval=' . $this->evaluation->get_id() . '"><img src="../img/edit.gif" border="0" title="' . get_lang('Modify') . '" alt="" /></a>';
+		}
 		if ($this->evaluation->get_course_code() == null) {
 			$edit_column.= '&nbsp;<a href="' . api_get_self() . '?resultdelete=' . $item['result_id'] . '&selecteval=' . $this->evaluation->get_id() . '" onclick="return confirmationuser();"><img src="../img/delete.gif" border="0" title="' . get_lang('Delete') . '" alt="" /></a>';
 		$edit_column.= '&nbsp;<a href="user_stats.php?userid=' . $item['id'] . '&selecteval=' . $this->evaluation->get_id() . '"><img src="../img/statistics.gif" width="17px" border="0" title="' . get_lang('Statistics') . '" alt="" /></a>';