addet SETTUPLEITEM and added cast to GETTUPLEITEM
diff --git a/Include/tupleobject.h b/Include/tupleobject.h
index da76891..992c770 100644
--- a/Include/tupleobject.h
+++ b/Include/tupleobject.h
@@ -61,7 +61,10 @@
extern int _PyTuple_Resize Py_PROTO((PyObject **, int, int));
/* Macro, trading safety for speed */
-#define PyTuple_GET_ITEM(op, i) ((op)->ob_item[i])
+#define PyTuple_GET_ITEM(op, i) (((PyTupleObject *)(op))->ob_item[i])
+
+/* Macro, *only* to be used to fill in brand new tuples */
+#define PyTuple_SET_ITEM(op, i, v) (((PyTupleObject *)(op))->ob_item[i] = v)
#ifdef __cplusplus
}