don't use NDEBUG
diff --git a/Include/frameobject.h b/Include/frameobject.h
index a38a85d..5bf94c3 100644
--- a/Include/frameobject.h
+++ b/Include/frameobject.h
@@ -73,7 +73,7 @@
 
 /* Tuple access macros */
 
-#ifdef NDEBUG
+#ifndef DEBUG
 #define GETITEM(v, i) PyTuple_GET_ITEM((PyTupleObject *)(v), (i))
 #define GETITEMNAME(v, i) \
 	PyString_AS_STRING((PyStringObject *)GETITEM((v), (i)))