$NetBSD: patch-ac,v 1.1 2005/10/04 19:23:39 joerg Exp $

--- csound/sysdep.h.orig	2005-10-04 15:13:28.000000000 +0200
+++ csound/sysdep.h
@@ -38,7 +38,7 @@
 #define __FL_DEF
 #endif
 
-#if defined(LINUX) || defined(__MACH__) || defined(NETBSD)
+#if defined(LINUX) || defined(__MACH__) || defined(NETBSD) || defined(__DragonFly__)
 # include <unistd.h>       /* for open() etc protos on mac */
 #endif
 
