tablelib.php.diff

diff --git a/lib/tablelib.php b/lib/tablelib.php
index 06516e9..872ddc8 100644
--- a/lib/tablelib.php
+++ b/lib/tablelib.php
@@ -535,6 +535,9 @@ class flexible_table {
                 'i_last'   => '',
                 'textsort' => $this->column_textsort,
             );
+            if (!empty($this->sort_default_column))  {
+                $this->prefs['sortby'] = array($this->sort_default_column => $this->sort_default_order);
+            }
         }
 
         // Save user preferences if they have changed.