$NetBSD: patch-aj,v 1.4 2010/03/03 03:40:00 dmcmahill Exp $

--- plot/plotInt.h.orig	2008-11-16 22:06:54.000000000 +0000
+++ plot/plotInt.h
@@ -28,7 +28,7 @@
 #define VERSATEC		/* Add this for HP plotter support */
 
 /* system V machines lack vfont.h, so include the defs below. */
-#if  !defined(SYSV) && !defined(__FreeBSD__) && !defined(__NetBSD__) && !defined(CYGWIN) && !defined(macosx)
+#if  !defined(SYSV) && !defined(__FreeBSD__) && !defined(__NetBSD__) && !defined(CYGWIN) && !defined(macosx) && !defined(__DragonFly__)
 #include <vfont.h>
 #else
 struct header {