diff --git a/src/lp/cache-policy.cpp b/src/lp/cache-policy.cpp
index 2802b96..37dad5e 100644
--- a/src/lp/cache-policy.cpp
+++ b/src/lp/cache-policy.cpp
@@ -1,6 +1,6 @@
 /* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
-/**
- * Copyright (c) 2013-2015 Regents of the University of California.
+/*
+ * Copyright (c) 2013-2017 Regents of the University of California.
  *
  * This file is part of ndn-cxx library (NDN C++ library with eXperimental eXtensions).
  *
@@ -22,6 +22,7 @@
  */
 
 #include "cache-policy.hpp"
+#include "../encoding/block-helpers.hpp"
 
 namespace ndn {
 namespace lp {