diff --git a/daemon/face/websocket-channel.hpp b/daemon/face/websocket-channel.hpp
index a793a7c..aeae9cc 100644
--- a/daemon/face/websocket-channel.hpp
+++ b/daemon/face/websocket-channel.hpp
@@ -1,6 +1,6 @@
 /* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
 /*
- * Copyright (c) 2014-2023,  Regents of the University of California,
+ * Copyright (c) 2014-2024,  Regents of the University of California,
  *                           Arizona Board of Regents,
  *                           Colorado State University,
  *                           University Pierre & Marie Curie, Sorbonne University,
@@ -29,6 +29,8 @@
 #include "channel.hpp"
 #include "websocketpp.hpp"
 
+#include <map>
+
 namespace nfd::websocket {
 using Endpoint = boost::asio::ip::tcp::endpoint;
 } // namespace nfd::websocket