diff --git a/core/lib/Drupal/Core/Database/StatementInterface.php b/core/lib/Drupal/Core/Database/StatementInterface.php
index 6792e3e..1d82d11 100644
--- a/core/lib/Drupal/Core/Database/StatementInterface.php
+++ b/core/lib/Drupal/Core/Database/StatementInterface.php
@@ -114,7 +114,7 @@ public function setFetchMode($mode, $a1 = NULL, $a2 = array());
    * @return
    *   A result, formatted according to $mode.
    */
-   public function fetch($mode = NULL, $cursor_orientation = NULL, $cursor_offset = NULL);
+   public function fetch($mode = NULL, $cursor_orientation = \PDO::FETCH_ORI_NEXT, $cursor_offset = 0);
 
   /**
    * Returns a single field from the next record of a result set.