$OpenBSD: patch-src_gpg_fmt_plug_c,v 1.4 2015/01/18 11:57:22 sthen Exp $
--- src/gpg_fmt_plug.c.orig	Thu Dec 18 00:59:02 2014
+++ src/gpg_fmt_plug.c	Sun Jan 18 04:51:59 2015
@@ -54,6 +54,10 @@ john_register_one(&fmt_gpg);
 #include "stdint.h"
 #include "memdbg.h"
 
+#ifndef C_Block
+#define C_Block DES_cblock
+#endif
+
 #define FORMAT_LABEL        "gpg"
 #define FORMAT_NAME         "OpenPGP / GnuPG Secret Key"
 #define ALGORITHM_NAME      "32/" ARCH_BITS_STR
