diff --git a/ext/standard/basic_functions.c b/ext/standard/basic_functions.c
index 5ca7ec0ffe7..3c60308fe4f 100644
--- a/ext/standard/basic_functions.c
+++ b/ext/standard/basic_functions.c
@@ -2635,7 +2635,7 @@ ZEND_BEGIN_ARG_INFO(arginfo_serialize, 0)
 	ZEND_ARG_INFO(0, var)
 ZEND_END_ARG_INFO()
 
-ZEND_BEGIN_ARG_INFO_EX(arginfo_unserialize, 0, 0, 1)
+ZEND_BEGIN_ARG_INFO(arginfo_unserialize, 0)
 	ZEND_ARG_INFO(0, variable_representation)
 ZEND_END_ARG_INFO()