#1629: Renamed Py_Size, Py_Type and Py_Refcnt to Py_SIZE, Py_TYPE and Py_REFCNT.
diff --git a/Include/boolobject.h b/Include/boolobject.h
index 33f8112..7cc2f1f 100644
--- a/Include/boolobject.h
+++ b/Include/boolobject.h
@@ -9,7 +9,7 @@
 
 PyAPI_DATA(PyTypeObject) PyBool_Type;
 
-#define PyBool_Check(x) (Py_Type(x) == &PyBool_Type)
+#define PyBool_Check(x) (Py_TYPE(x) == &PyBool_Type)
 
 /* Py_False and Py_True are the only two bools in existence.
 Don't forget to apply Py_INCREF() when returning either!!! */