From 03642b8e3fb9289b73679a921f8b71faef18c872 Mon Sep 17 00:00:00 2001
From: Ray Kim <msca8h@naver.com>
Date: Mon, 26 Jun 2017 03:05:23 +0900
Subject: [PATCH] Fixed build error

compiler didn't understand std::function
include ```<functional>```
---
 include/nana/gui/detail/native_window_interface.hpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/include/nana/gui/detail/native_window_interface.hpp b/include/nana/gui/detail/native_window_interface.hpp
index 737423bf..c80d51f1 100644
--- a/include/nana/gui/detail/native_window_interface.hpp
+++ b/include/nana/gui/detail/native_window_interface.hpp
@@ -16,6 +16,8 @@
 #include "../basis.hpp"
 #include <nana/paint/image.hpp>
 
+#include <functional>
+
 namespace nana
 {
 namespace detail