diff --git a/ext/spl/php_spl.c b/ext/spl/php_spl.c
index 1e80bf26228..0ef42a74579 100755
--- a/ext/spl/php_spl.c
+++ b/ext/spl/php_spl.c
@@ -780,6 +780,7 @@ ZEND_END_ARG_INFO();
 
 ZEND_BEGIN_ARG_INFO_EX(arginfo_class_parents, 0, 0, 1)
 	ZEND_ARG_INFO(0, instance)
+	ZEND_ARG_INFO(0, autoload)
 ZEND_END_ARG_INFO()
 
 ZEND_BEGIN_ARG_INFO_EX(arginfo_class_implements, 0, 0, 1)