diff --git a/classes/sanitizedummy.php b/classes/sanitizedummy.php
index a184bec30..7182fb7f5 100644
--- a/classes/sanitizedummy.php
+++ b/classes/sanitizedummy.php
@@ -1,6 +1,6 @@
 <?php
 class SanitizeDummy extends SimplePie_Sanitize {
-	function sanitize($data, $type, $base) {
+	function sanitize($data, $type, $base = '') {
 		return $data;
 	}
 }