diff --git a/classes/Tools.php b/classes/Tools.php
index 7a03d3969..4802ad24b 100644
--- a/classes/Tools.php
+++ b/classes/Tools.php
@@ -961,7 +961,7 @@ class ToolsCore
 	 * @param bool $utf8_decode (deprecated)
 	 * @return string
 	 */
-	public static function link_rewrite($str, $utf8_decode = false)
+	public static function link_rewrite($str, $utf8_decode = null)
 	{
 		if ($utf8_decode !== null)
 			Tools::displayParameterAsDeprecated('utf8_decode');