diff --git a/src/client-module.cpp b/src/client-module.cpp
index e4162d2..0d98d90 100644
--- a/src/client-module.cpp
+++ b/src/client-module.cpp
@@ -1,6 +1,6 @@
 /* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
 /**
- * Copyright (c) 2017, Regents of the University of California.
+ * Copyright (c) 2017-2018, Regents of the University of California.
  *
  * This file is part of ndncert, a certificate management system based on NDN.
  *
@@ -38,6 +38,8 @@
 {
 }
 
+ClientModule::~ClientModule() = default;
+
 void
 ClientModule::requestCaTrustAnchor(const Name& caName, const DataCallback& trustAnchorCallback,
                                    const ErrorCallback& errorCallback)