diff --git a/model/SqlDbDriver.php b/model/SqlDbDriver.php
index de78409..fa86668 100644
--- a/model/SqlDbDriver.php
+++ b/model/SqlDbDriver.php
@@ -41,7 +41,7 @@ abstract class SqlDbDriver extends DbDriver
      * @param mixed $on_duplicate
      * @return int Affected rows count
      */
-    public function insert($table, $data)
+    public function insert($table, $data, $on_duplicate = array())
     {
         $columns = array();
         foreach ($data as $col => $val) {