diff --git a/Include/pyport.h b/Include/pyport.h
index 27193fe..b75b5ee 100644
--- a/Include/pyport.h
+++ b/Include/pyport.h
@@ -32,7 +32,13 @@
 **************************************************************************/
 
 
-#define ANY void /* For API compatibility only. Obsolete, do not use. */
+/* For backward compatibility only. Obsolete, do not use. */
+#define ANY void
+#ifdef HAVE_PROTOTYPES
+#define Py_PROTO(x) x
+#else
+#define Py_PROTO(x) ()
+#endif
 
 /* typedefs for some C9X-defined synonyms for integral types.
  *