diff -urN M2Crypto/SWIG/_m2crypto.i M2Crypto-0.21.1/SWIG/_m2crypto.i
--- M2Crypto/SWIG/_m2crypto.i	2011-01-15 20:10:06.000000000 +0100
+++ M2Crypto-0.21.1/SWIG/_m2crypto.i	2011-01-18 15:37:33.948994579 +0100
@@ -7,6 +7,7 @@
  * Copyright (c) 2009-2010 Heikki Toivonen. All rights reserved.
  *
  */
+%import "gcc_macros.h"
 
 %module(threads=1) _m2crypto
 /* We really don't need threadblock (PyGILState_Ensure() etc.) anywhere.