diff --git a/Include/cpython/abstract.h b/Include/cpython/abstract.h
index 76eaedf..c0b0182 100644
--- a/Include/cpython/abstract.h
+++ b/Include/cpython/abstract.h
@@ -67,7 +67,7 @@
 {
     assert(callable != NULL);
     PyTypeObject *tp = Py_TYPE(callable);
-    if (!PyType_HasFeature(tp, _Py_TPFLAGS_HAVE_VECTORCALL)) {
+    if (!PyType_HasFeature(tp, Py_TPFLAGS_HAVE_VECTORCALL)) {
         return NULL;
     }
     assert(PyCallable_Check(callable));
@@ -178,7 +178,7 @@
 static inline PyObject *
 PyObject_CallMethodNoArgs(PyObject *self, PyObject *name)
 {
-    return _PyObject_VectorcallMethod(name, &self,
+    return PyObject_VectorcallMethod(name, &self,
            1 | PY_VECTORCALL_ARGUMENTS_OFFSET, NULL);
 }
 
@@ -187,7 +187,7 @@
 {
     assert(arg != NULL);
     PyObject *args[2] = {self, arg};
-    return _PyObject_VectorcallMethod(name, args,
+    return PyObject_VectorcallMethod(name, args,
            2 | PY_VECTORCALL_ARGUMENTS_OFFSET, NULL);
 }