diff --git a/lib/Doctrine/Connection/Mysql.php b/lib/Doctrine/Connection/Mysql.php
index a5ea70d17..391be15bc 100644
--- a/lib/Doctrine/Connection/Mysql.php
+++ b/lib/Doctrine/Connection/Mysql.php
@@ -169,7 +169,7 @@ class Doctrine_Connection_Mysql extends Doctrine_Connection_Common {
      *
      * @return integer      the number of affected rows
      */
-    public function replace($table, $fields) {
+    public function replace($table, array $fields, array $keys) {
         $count = count($fields);
         $query = $values = '';
         $keys = $colnum = 0;