diff --git a/ext/date/php_date.h b/ext/date/php_date.h
index e45f30d0f8c..f5f43bc7dfb 100644
--- a/ext/date/php_date.h
+++ b/ext/date/php_date.h
@@ -89,9 +89,9 @@ static inline php_timezone_obj *php_timezone_obj_from_obj(zend_object *obj) {
 struct _php_interval_obj {
 	timelib_rel_time *diff;
 	int               civil_or_wall;
+	bool              initialized;
 	bool              from_string;
 	zend_string      *date_string;
-	bool              initialized;
 	zend_object       std;
 };