diff --git a/grade/edit/tree/lib.php b/grade/edit/tree/lib.php
index c5b3c4a5760..820148f5d88 100644
--- a/grade/edit/tree/lib.php
+++ b/grade/edit/tree/lib.php
@@ -1201,7 +1201,7 @@ class grade_edit_tree_column_select extends grade_edit_tree_column {
         if ($params['itemtype'] != 'course' && $params['itemtype'] != 'category') {
             $itemselect = '<label class="accesshide" for="select_'.$params['eid'].'">'.
                 get_string('select', 'grades', $item->itemname).'</label>
-                <input class="itemselect" type="checkbox" name="select_'.$params['eid'].
+                <input class="itemselect" type="checkbox" name="select_'.$params['eid'].'" id="select_'.$params['eid'].
                 '" onchange="toggleCategorySelector();"/>'; // TODO: convert to YUI handler
         }
         //html_writer::table() will wrap the item cell contents in a <TD> so don't do it here
diff --git a/mod/assign/gradingtable.php b/mod/assign/gradingtable.php
index fb68b320e02..e2a78fb36c4 100644
--- a/mod/assign/gradingtable.php
+++ b/mod/assign/gradingtable.php
@@ -527,7 +527,7 @@ class assign_grading_table extends table_sql implements renderable {
     function col_select(stdClass $row) {
         return '<label class="accesshide" for="selectuser_' . $row->userid . '">' .
             get_string('selectuser', 'assign', fullname($row)) . '</label>
-            <input type="checkbox" id=="selectuser_' . $row->userid . 'name="selectedusers" value="' . $row->userid . '"/>';
+            <input type="checkbox" id="selectuser_' . $row->userid . '" name="selectedusers" value="' . $row->userid . '"/>';
     }
 
     /**