$NetBSD: patch-an,v 1.1 2005/12/27 13:47:11 joerg Exp $

--- include/osdefs.h.orig	2005-12-18 20:28:55.000000000 +0000
+++ include/osdefs.h
@@ -79,7 +79,7 @@
 # define NOINITGROUPS
 #endif
 
-#if defined(BSDI) || defined(FREEBSD) || defined(LINUX2)
+#if defined(BSDI) || defined(FREEBSD) || defined(LINUX2) || defined(__DragonFly__)
 # ifndef HAVESYSERR
 #  define HAVESYSERR
 # endif
