$OpenBSD: patch-src_efs_fmt_plug_c,v 1.4 2015/01/18 11:57:22 sthen Exp $
--- src/efs_fmt_plug.c.orig	Thu Dec 18 00:59:02 2014
+++ src/efs_fmt_plug.c	Sun Jan 18 04:51:49 2015
@@ -42,6 +42,10 @@ john_register_one(&fmt_efs);
 #endif
 #include "memdbg.h"
 
+#ifndef C_Block
+#define C_Block DES_cblock
+#endif
+
 #ifdef MMX_COEF
 #define SHA1_BLK                (SHA1_SSE_PARA * MMX_COEF)
 #endif
