diff --git a/Objects/classobject.c b/Objects/classobject.c
index fb89b8a..33afbcd 100644
--- a/Objects/classobject.c
+++ b/Objects/classobject.c
@@ -350,7 +350,7 @@
     PyObject_GenericSetAttr,                    /* tp_setattro */
     0,                                          /* tp_as_buffer */
     Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC |
-    _Py_TPFLAGS_HAVE_VECTORCALL,                /* tp_flags */
+    Py_TPFLAGS_HAVE_VECTORCALL,                 /* tp_flags */
     method_doc,                                 /* tp_doc */
     (traverseproc)method_traverse,              /* tp_traverse */
     0,                                          /* tp_clear */