diff --git a/Zend/zend.c b/Zend/zend.c
index 17d2cda0c57..f44321b386d 100644
--- a/Zend/zend.c
+++ b/Zend/zend.c
@@ -289,6 +289,8 @@ static void register_standard_class(void)
 	zend_standard_class_def->handle_property_get = NULL;
 	zend_standard_class_def->handle_property_set = NULL;
 	zend_standard_class_def->refcount = 1;
+	zend_standard_class_def->constants_updated = 0;
+
 	zend_hash_add(GLOBAL_CLASS_TABLE, "stdclass", sizeof("stdclass"), &zend_standard_class_def, sizeof(zend_class_entry *), NULL);
 }