new debugger symbol names
diff --git a/Objects/tupleobject.c b/Objects/tupleobject.c
index 2218e50..19c3641 100644
--- a/Objects/tupleobject.c
+++ b/Objects/tupleobject.c
@@ -418,7 +418,7 @@
 	if (sizediff == 0)
 		return 0;
 	/* XXX UNREF/NEWREF interface should be more symmetrical */
-#ifdef REF_DEBUG
+#ifdef Py_REF_DEBUG
 	--_Py_RefTotal;
 #endif
 	UNREF(v);