diff --git a/sao/src/view/tree.js b/sao/src/view/tree.js
index b0cea1da1a..604f455717 100644
--- a/sao/src/view/tree.js
+++ b/sao/src/view/tree.js
@@ -199,7 +199,8 @@
                 sum_row.append(jQuery('<th/>'));
                 this.tfoot = jQuery('<tfoot/>');
                 this.tfoot.append(sum_row);
-                this.table.append(this.tfoot);
+                // insert before thead to not hide drop-down from thead
+                this.table.prepend(this.tfoot);
             }
 
             this.columns.forEach(function(column) {