examples: add missing include
Change-Id: I0d5d3c9a710d4d660605a3c4ba7ccdac133e6add
diff --git a/examples/data-producer.cpp b/examples/data-producer.cpp
index 806c011..92dedd3 100644
--- a/examples/data-producer.cpp
+++ b/examples/data-producer.cpp
@@ -1,6 +1,6 @@
/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
/*
- * Copyright (c) 2014-2017, Regents of the University of California.
+ * Copyright (c) 2014-2018, Regents of the University of California.
*
* This file is part of NDN repo-ng (Next generation of NDN repository).
* See AUTHORS.md for complete list of repo-ng authors and contributors.
@@ -35,6 +35,7 @@
#include "../src/common.hpp"
+#include <boost/asio/io_service.hpp>
#include <boost/lexical_cast.hpp>
#include <fstream>
#include <iostream>