--- a/Include/objimpl.h	Wed Aug 01 21:44:14 2001 +0000
+++ b/Include/objimpl.h	Thu Aug 02 04:15:00 2001 +0000
@@ -236,7 +236,13 @@
 #define PyObject_GC_Fini(op)
 #define PyObject_AS_GC(op) (op)
 #define PyObject_FROM_GC(op) (op)
- 
+#define PyType_IS_GC(t) 0
+#define PyObject_IS_GC(o) 0
+#define PyObject_AS_GC(o) (o)
+#define PyObject_FROM_GC(o) (o)
+#define PyType_BASICSIZE(t) ((t)->tp_basicsize)
+#define PyType_SET_BASICSIZE(t, s) ((t)->tp_basicsize = (s))
+
 #else
 
 /* Add the object into the container set */
@@ -269,6 +275,13 @@
 /* Get the object given the PyGC_Head */
 #define PyObject_FROM_GC(g) ((PyObject *)(((PyGC_Head *)g)+1))
 
+/* Calculate tp_basicsize excluding PyGC_HEAD_SIZE if applicable */
+#define PyType_BASICSIZE(t) (!PyType_IS_GC(t) ? (t)->tp_basicsize : \
+			     (t)->tp_basicsize - PyGC_HEAD_SIZE)
+#define PyType_SET_BASICSIZE(t, s) (!PyType_IS_GC(t) ? \
+			((t)->tp_basicsize = (s)) : \
+			((t)->tp_basicsize  = (s) + PyGC_HEAD_SIZE))
+
 extern DL_IMPORT(void) _PyGC_Dump(PyGC_Head *);
 
 #endif /* WITH_CYCLE_GC */