diff --git a/core/common.hpp b/core/common.hpp
index 8e8c1db..4e76a6b 100644
--- a/core/common.hpp
+++ b/core/common.hpp
@@ -1,6 +1,6 @@
 /* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
 /*
- * Copyright (c) 2014-2018,  Regents of the University of California,
+ * Copyright (c) 2014-2019,  Regents of the University of California,
  *                           Arizona Board of Regents,
  *                           Colorado State University,
  *                           University Pierre & Marie Curie, Sorbonne University,
@@ -66,7 +66,6 @@
 #include <ndn-cxx/security/key-chain.hpp>
 #include <ndn-cxx/util/backports.hpp>
 #include <ndn-cxx/util/scheduler.hpp>
-#include <ndn-cxx/util/scheduler-scoped-event-id.hpp>
 #include <ndn-cxx/util/signal.hpp>
 #include <ndn-cxx/util/time.hpp>
 
diff --git a/tools/chunks/catchunks/pipeline-interests-aimd.cpp b/tools/chunks/catchunks/pipeline-interests-aimd.cpp
index b9f7080..73e22c5 100644
--- a/tools/chunks/catchunks/pipeline-interests-aimd.cpp
+++ b/tools/chunks/catchunks/pipeline-interests-aimd.cpp
@@ -1,6 +1,6 @@
 /* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
 /*
- * Copyright (c) 2016-2018, Regents of the University of California,
+ * Copyright (c) 2016-2019, Regents of the University of California,
  *                          Colorado State University,
  *                          University Pierre & Marie Curie, Sorbonne University.
  *
@@ -43,7 +43,6 @@
   , m_options(options)
   , m_rttEstimator(rttEstimator)
   , m_scheduler(m_face.getIoService())
-  , m_checkRtoEvent(m_scheduler)
   , m_highData(0)
   , m_highInterest(0)
   , m_recPoint(0)
diff --git a/tools/ping/client/ping.cpp b/tools/ping/client/ping.cpp
index 7f2e2a4..b83c160 100644
--- a/tools/ping/client/ping.cpp
+++ b/tools/ping/client/ping.cpp
@@ -1,6 +1,6 @@
 /* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
 /*
- * Copyright (c) 2014-2018,  Arizona Board of Regents.
+ * Copyright (c) 2014-2019,  Arizona Board of Regents.
  *
  * This file is part of ndn-tools (Named Data Networking Essential Tools).
  * See AUTHORS.md for complete list of ndn-tools authors and contributors.
@@ -35,7 +35,6 @@
   , m_nOutstanding(0)
   , m_face(face)
   , m_scheduler(m_face.getIoService())
-  , m_nextPingEvent(m_scheduler)
 {
   if (m_options.shouldGenerateRandomSeq) {
     m_nextSeq = random::generateWord64();