diff --git a/skywalking.c b/skywalking.c
index 7fd982d00242407d36af0bde07dace6bc7b8b923..6b453bfaa3af98dd4a841afdc6251ff89d0efc9b 100644
--- a/skywalking.c
+++ b/skywalking.c
@@ -900,7 +900,7 @@ static char *sky_json_encode(zval *parameter){
 
 	smart_str buf = {0};
 	zend_long options = 64;
-#if PHP_VERSION_ID >= 71000
+#if PHP_VERSION_ID >= 70100
 	return_code = php_json_encode(&buf, parameter, (int)options);
 	if (return_code != SUCCESS) {
 		smart_str_free(&buf);