$OpenBSD: patch-ash_shell_cc,v 1.1 2016/10/27 18:30:40 robert Exp $
--- ash/shell.cc.orig.port	Tue Oct 25 21:56:43 2016
+++ ash/shell.cc	Tue Oct 25 21:57:45 2016
@@ -698,7 +698,7 @@ void Shell::Init(const ShellInitParams& init_params) {
 
   immersive_handler_factory_ = base::MakeUnique<ImmersiveHandlerFactoryAsh>();
 
-#if defined(OS_LINUX) && !defined(OS_CHROMEOS)
+#if (defined(OS_BSD) || defined(OS_LINUX)) && !defined(OS_CHROMEOS)
   DCHECK(in_mus_) << "linux desktop does not support ash.";
 #endif
 
