diff --git a/phpc.h b/phpc.h
index 4b55747..70fb317 100644
--- a/phpc/phpc.h
+++ b/phpc/phpc.h
@@ -51,6 +51,12 @@
 	memcpy(&PHPC_OBJ_GET_HANDLER_VAR_NAME(_name), \
 		zend_get_std_object_handlers(), sizeof(zend_object_handlers))
 
+/* for arginfo */
+#ifndef ZEND_BEGIN_ARG_WITH_TENTATIVE_RETURN_TYPE_INFO_EX
+#define ZEND_BEGIN_ARG_WITH_TENTATIVE_RETURN_TYPE_INFO_EX(name, return_reference, required_num_args, type, allow_null) \
+        ZEND_BEGIN_ARG_INFO_EX(name, 0, return_reference, required_num_args)
+#endif
+
 /* ZEND_ACC_CTOR and ZEND_ACC_DTOR is removed in 7.4 */
 #ifndef ZEND_ACC_CTOR
 #define ZEND_ACC_CTOR 0
diff --git a/gnupg_keylistiterator.c b/gnupg_keylistiterator.c
index 215aaa0..9b285ee 100644
--- a/gnupg_keylistiterator.c
+++ b/gnupg_keylistiterator.c
@@ -90,14 +90,28 @@ ZEND_BEGIN_ARG_INFO_EX(arginfo_gnupg_void_iterator_method, 0, 0, 0)
 ZEND_END_ARG_INFO()
 /* }}} */
 
+ZEND_BEGIN_ARG_WITH_TENTATIVE_RETURN_TYPE_INFO_EX(arginfo_gnupg_current, 0, 0, IS_MIXED, 0)
+ZEND_END_ARG_INFO()
+
+#define arginfo_gnupg_key arginfo_gnupg_current
+
+ZEND_BEGIN_ARG_WITH_TENTATIVE_RETURN_TYPE_INFO_EX(arginfo_gnupg_valid, 0, 0, _IS_BOOL, 0)
+ZEND_END_ARG_INFO()
+
+ZEND_BEGIN_ARG_WITH_TENTATIVE_RETURN_TYPE_INFO_EX(arginfo_gnupg_next, 0, 0, IS_VOID, 0)
+ZEND_END_ARG_INFO()
+
+#define arginfo_gnupg_rewind  arginfo_gnupg_next
+
+
 /* {{{ method list gnupg_keylistiterator */
 static zend_function_entry gnupg_keylistiterator_methods[] = {
 	PHP_ME(gnupg_keylistiterator, __construct, arginfo_gnupg_void_iterator_method, ZEND_ACC_PUBLIC)
-	PHP_ME(gnupg_keylistiterator, current, arginfo_gnupg_void_iterator_method, ZEND_ACC_PUBLIC)
-	PHP_ME(gnupg_keylistiterator, key, arginfo_gnupg_void_iterator_method, ZEND_ACC_PUBLIC)
-	PHP_ME(gnupg_keylistiterator, next, arginfo_gnupg_void_iterator_method, ZEND_ACC_PUBLIC)
-	PHP_ME(gnupg_keylistiterator, rewind, arginfo_gnupg_void_iterator_method, ZEND_ACC_PUBLIC)
-	PHP_ME(gnupg_keylistiterator, valid, arginfo_gnupg_void_iterator_method, ZEND_ACC_PUBLIC)
+	PHP_ME(gnupg_keylistiterator, current, arginfo_gnupg_current, ZEND_ACC_PUBLIC)
+	PHP_ME(gnupg_keylistiterator, key, arginfo_gnupg_key, ZEND_ACC_PUBLIC)
+	PHP_ME(gnupg_keylistiterator, next, arginfo_gnupg_next, ZEND_ACC_PUBLIC)
+	PHP_ME(gnupg_keylistiterator, rewind, arginfo_gnupg_rewind, ZEND_ACC_PUBLIC)
+	PHP_ME(gnupg_keylistiterator, valid, arginfo_gnupg_valid, ZEND_ACC_PUBLIC)
 	PHPC_FE_END
 };
 /* }}} */