build: switch to C++17
Change-Id: Ie68020a04b7e20b74778b6d0370544ded55c5e26
diff --git a/daemon/fw/access-strategy.hpp b/daemon/fw/access-strategy.hpp
index edcf63b..1aaa5ed 100644
--- a/daemon/fw/access-strategy.hpp
+++ b/daemon/fw/access-strategy.hpp
@@ -1,6 +1,6 @@
/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
/*
- * Copyright (c) 2014-2021, Regents of the University of California,
+ * Copyright (c) 2014-2022, Regents of the University of California,
* Arizona Board of Regents,
* Colorado State University,
* University Pierre & Marie Curie, Sorbonne University,
@@ -31,6 +31,8 @@
#include <ndn-cxx/util/rtt-estimator.hpp>
+#include <unordered_map>
+
namespace nfd {
namespace fw {