Fix compilation with boost 1.66.0
Change-Id: Ibf2883a974c834a5281c39a551e6d467d4454501
diff --git a/src/transport/transport.hpp b/src/transport/transport.hpp
index f656802..b177fad 100644
--- a/src/transport/transport.hpp
+++ b/src/transport/transport.hpp
@@ -1,6 +1,6 @@
/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
-/**
- * Copyright (c) 2013-2016 Regents of the University of California.
+/*
+ * Copyright (c) 2013-2017 Regents of the University of California.
*
* This file is part of ndn-cxx library (NDN C++ library with eXperimental eXtensions).
*
@@ -24,15 +24,10 @@
#include "../common.hpp"
#include "../encoding/block.hpp"
+#include "../net/asio-fwd.hpp"
#include <boost/system/error_code.hpp>
-namespace boost {
-namespace asio {
-class io_service;
-} // namespace asio
-} // namespace boost
-
namespace ndn {
/** \brief provides TLV-block delivery service