diff --git a/core/common.hpp b/core/common.hpp
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+/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
+/**
+ * Copyright (c) 2014-2016,  Regents of the University of California,
+ *                           Arizona Board of Regents,
+ *                           Colorado State University,
+ *                           University Pierre & Marie Curie, Sorbonne University,
+ *                           Washington University in St. Louis,
+ *                           Beijing Institute of Technology,
+ *                           The University of Memphis.
+ *
+ * This file is part of NFD (Named Data Networking Forwarding Daemon).
+ * See AUTHORS.md for complete list of NFD authors and contributors.
+ *
+ * NFD is free software: you can redistribute it and/or modify it under the terms
+ * of the GNU General Public License as published by the Free Software Foundation,
+ * either version 3 of the License, or (at your option) any later version.
+ *
+ * NFD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
+ * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
+ * PURPOSE.  See the GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * NFD, e.g., in COPYING.md file.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef NFD_CORE_COMMON_HPP
+#define NFD_CORE_COMMON_HPP
+
+#include "core/config.hpp"
+
+#ifdef WITH_TESTS
+#define VIRTUAL_WITH_TESTS virtual
+#define PUBLIC_WITH_TESTS_ELSE_PROTECTED public
+#define PUBLIC_WITH_TESTS_ELSE_PRIVATE public
+#define PROTECTED_WITH_TESTS_ELSE_PRIVATE protected
+#else
+#define VIRTUAL_WITH_TESTS
+#define PUBLIC_WITH_TESTS_ELSE_PROTECTED protected
+#define PUBLIC_WITH_TESTS_ELSE_PRIVATE private
+#define PROTECTED_WITH_TESTS_ELSE_PRIVATE private
+#endif
+
+#include <cstddef>
+#include <cstdint>
+#include <functional>
+#include <limits>
+#include <list>
+#include <map>
+#include <memory>
+#include <set>
+#include <string>
+#include <unordered_map>
+#include <unordered_set>
+#include <utility>
+#include <vector>
+
+#include <ndn-cxx/interest.hpp>
+#include <ndn-cxx/data.hpp>
+#include <ndn-cxx/name.hpp>
+#include <ndn-cxx/encoding/block.hpp>
+#include <ndn-cxx/lp/nack.hpp>
+#include <ndn-cxx/util/backports.hpp>
+#include <ndn-cxx/util/face-uri.hpp>
+#include <ndn-cxx/util/signal.hpp>
+
+#include <boost/algorithm/string.hpp>
+#include <boost/asio.hpp>
+#include <boost/assert.hpp>
+#include <boost/lexical_cast.hpp>
+#include <boost/noncopyable.hpp>
+#include <boost/property_tree/ptree.hpp>
+#include <boost/throw_exception.hpp>
+
+namespace nfd {
+
+using std::size_t;
+
+using boost::noncopyable;
+
+using std::shared_ptr;
+using std::unique_ptr;
+using std::weak_ptr;
+using std::make_shared;
+using ndn::make_unique;
+using std::enable_shared_from_this;
+
+using std::static_pointer_cast;
+using std::dynamic_pointer_cast;
+using std::const_pointer_cast;
+
+using std::function;
+using std::bind;
+using std::ref;
+using std::cref;
+
+using ndn::to_string;
+
+using ndn::Interest;
+using ndn::Data;
+using ndn::Name;
+using ndn::PartialName;
+using ndn::Exclude;
+using ndn::Link;
+using ndn::Block;
+using ndn::util::FaceUri;
+
+namespace tlv {
+// Don't write "namespace tlv = ndn::tlv", because NFD can add other members into this namespace.
+using namespace ndn::tlv;
+} // namespace tlv
+
+namespace lp = ndn::lp;
+namespace name = ndn::name;
+namespace time = ndn::time;
+namespace signal = ndn::util::signal;
+
+} // namespace nfd
+
+#endif // NFD_CORE_COMMON_HPP