From ce89b77bbaf2c33a86fa79f0dac004864a04020d Mon Sep 17 00:00:00 2001
From: Gleb Natapov <gleb@cloudius-systems.com>
Date: Sun, 31 May 2015 15:22:48 +0300
Subject: [PATCH] tests: add missing header

---
 tests/thread_context_switch.cc | 1 +
 1 file changed, 1 insertion(+)

diff --git a/tests/thread_context_switch.cc b/tests/thread_context_switch.cc
index c3b19751b8..f462aa22d5 100644
--- a/tests/thread_context_switch.cc
+++ b/tests/thread_context_switch.cc
@@ -20,6 +20,7 @@
  * Copyright (C) 2015 Cloudius Systems, Ltd.
  */
 
+#include <experimental/optional>
 #include "core/thread.hh"
 #include "core/semaphore.hh"
 #include "core/app-template.hh"