$NetBSD$

--- src/VBox/Runtime/r3/posix/semevent-posix.cpp.orig	2010-06-25 14:25:34.000000000 +0000
+++ src/VBox/Runtime/r3/posix/semevent-posix.cpp
@@ -47,7 +47,7 @@
 # define pthread_yield() pthread_yield_np()
 #endif
 
-#ifdef RT_OS_SOLARIS
+#if defined(RT_OS_SOLARIS) || defined(RT_OS_NETBSD)
 # include <sched.h>
 # define pthread_yield() sched_yield()
 #endif
