$NetBSD: patch-ao,v 1.3 2014/02/13 10:10:06 mrg Exp $

--- Top/threads.c.orig	2013-01-07 04:49:34.000000000 -0800
+++ Top/threads.c	2014-02-12 20:56:20.000000000 -0800
@@ -168,7 +168,7 @@
 
 
 
-#if defined(LINUX) || defined(__MACH__) || defined(WIN32)
+#if defined(LINUX) || defined(__MACH__) || defined(WIN32) || defined(__NetBSD__) || defined(__DragonFly__)
 
 #include <errno.h>
 #include <pthread.h>