diff --git a/Include/setobject.h b/Include/setobject.h
index 750a2a8..8914749 100644
--- a/Include/setobject.h
+++ b/Include/setobject.h
@@ -66,13 +66,13 @@
  *     hash is -1
  */
 
-#define PyFrozenSet_CheckExact(ob) ((ob)->ob_type == &PyFrozenSet_Type)
+#define PyFrozenSet_CheckExact(ob) (Py_Type(ob) == &PyFrozenSet_Type)
 #define PyAnySet_CheckExact(ob) \
-	((ob)->ob_type == &PySet_Type || (ob)->ob_type == &PyFrozenSet_Type)
+	(Py_Type(ob) == &PySet_Type || Py_Type(ob) == &PyFrozenSet_Type)
 #define PyAnySet_Check(ob) \
-	((ob)->ob_type == &PySet_Type || (ob)->ob_type == &PyFrozenSet_Type || \
-	  PyType_IsSubtype((ob)->ob_type, &PySet_Type) || \
-	  PyType_IsSubtype((ob)->ob_type, &PyFrozenSet_Type))
+	(Py_Type(ob) == &PySet_Type || Py_Type(ob) == &PyFrozenSet_Type || \
+	  PyType_IsSubtype(Py_Type(ob), &PySet_Type) || \
+	  PyType_IsSubtype(Py_Type(ob), &PyFrozenSet_Type))
 
 PyAPI_FUNC(PyObject *) PySet_New(PyObject *);
 PyAPI_FUNC(PyObject *) PyFrozenSet_New(PyObject *);