PEP 3123: Provide forward compatibility with Python 3.0, while keeping
backwards compatibility. Add Py_Refcnt, Py_Type, Py_Size, and
PyVarObject_HEAD_INIT.
diff --git a/Include/py_curses.h b/Include/py_curses.h
index aaff4bd..62d00d8 100644
--- a/Include/py_curses.h
+++ b/Include/py_curses.h
@@ -73,7 +73,7 @@
WINDOW *win;
} PyCursesWindowObject;
-#define PyCursesWindow_Check(v) ((v)->ob_type == &PyCursesWindow_Type)
+#define PyCursesWindow_Check(v) (Py_Type(v) == &PyCursesWindow_Type)
#ifdef CURSES_MODULE
/* This section is used when compiling _cursesmodule.c */