diff --git a/ext/json/json.c b/ext/json/json.c
index 5311d9c1139..5db3621b322 100644
--- a/ext/json/json.c
+++ b/ext/json/json.c
@@ -52,12 +52,8 @@ static const zend_function_entry json_functions[] = {
 /* }}} */
 
 /* {{{ JsonSerializable methods */
-ZEND_BEGIN_ARG_INFO(json_serialize_arginfo, 0)
-	/* No arguments */
-ZEND_END_ARG_INFO();
-
 static const zend_function_entry json_serializable_interface[] = {
-	PHP_ABSTRACT_ME(JsonSerializable, jsonSerialize, json_serialize_arginfo)
+	PHP_ABSTRACT_ME(JsonSerializable, jsonSerialize, arginfo_class_JsonSerializable_jsonSerialize)
 	PHP_FE_END
 };
 /* }}} */
diff --git a/ext/json/json.stub.php b/ext/json/json.stub.php
index 323cb6420d0..6b00648461f 100644
--- a/ext/json/json.stub.php
+++ b/ext/json/json.stub.php
@@ -9,3 +9,8 @@ function json_decode(string $json, ?bool $assoc = null, int $depth = 512, int $o
 function json_last_error(): int {}
 
 function json_last_error_msg(): string {}
+
+interface JsonSerializable
+{
+    public function jsonSerialize();
+}
diff --git a/ext/json/json_arginfo.h b/ext/json/json_arginfo.h
index 9c6f30686a6..b7177167904 100644
--- a/ext/json/json_arginfo.h
+++ b/ext/json/json_arginfo.h
@@ -18,3 +18,6 @@ ZEND_END_ARG_INFO()
 
 ZEND_BEGIN_ARG_WITH_RETURN_TYPE_INFO_EX(arginfo_json_last_error_msg, 0, 0, IS_STRING, 0)
 ZEND_END_ARG_INFO()
+
+ZEND_BEGIN_ARG_INFO_EX(arginfo_class_JsonSerializable_jsonSerialize, 0, 0, 0)
+ZEND_END_ARG_INFO()