diff --git a/src/lp/cache-policy.hpp b/src/lp/cache-policy.hpp
index f35dc06..f772101 100644
--- a/src/lp/cache-policy.hpp
+++ b/src/lp/cache-policy.hpp
@@ -1,6 +1,6 @@
 /* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
 /*
- * Copyright (c) 2013-2017 Regents of the University of California.
+ * Copyright (c) 2013-2018 Regents of the University of California.
  *
  * This file is part of ndn-cxx library (NDN C++ library with eXperimental eXtensions).
  *
@@ -50,11 +50,7 @@
   class Error : public ndn::tlv::Error
   {
   public:
-    explicit
-    Error(const std::string& what)
-      : ndn::tlv::Error(what)
-    {
-    }
+    using ndn::tlv::Error::Error;
   };
 
   CachePolicy();
diff --git a/src/lp/packet.hpp b/src/lp/packet.hpp
index 1aba8b1..872af58 100644
--- a/src/lp/packet.hpp
+++ b/src/lp/packet.hpp
@@ -33,11 +33,7 @@
   class Error : public ndn::tlv::Error
   {
   public:
-    explicit
-    Error(const std::string& what)
-      : ndn::tlv::Error(what)
-    {
-    }
+    using ndn::tlv::Error::Error;
   };
 
   Packet();
diff --git a/src/lp/prefix-announcement.hpp b/src/lp/prefix-announcement.hpp
index 135cc21..ef2b447 100644
--- a/src/lp/prefix-announcement.hpp
+++ b/src/lp/prefix-announcement.hpp
@@ -43,11 +43,7 @@
   class Error : public ndn::tlv::Error
   {
   public:
-    explicit
-    Error(const std::string& what)
-      : ndn::tlv::Error(what)
-    {
-    }
+    using ndn::tlv::Error::Error;
   };
 
   PrefixAnnouncement();