diff --git a/src/detail/probe-encoder.hpp b/src/detail/probe-encoder.hpp
index 6afe083..223c61b 100644
--- a/src/detail/probe-encoder.hpp
+++ b/src/detail/probe-encoder.hpp
@@ -1,6 +1,6 @@
 /* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
 /*
- * Copyright (c) 2017-2021, Regents of the University of California.
+ * Copyright (c) 2017-2022, Regents of the University of California.
  *
  * This file is part of ndncert, a certificate management system based on NDN.
  *
@@ -38,8 +38,7 @@
 Block
 encodeDataContent(const std::vector<Name>& identifiers,
                   optional<size_t> maxSuffixLength = nullopt,
-                  std::vector<std::shared_ptr<Certificate>> redirectionItems =
-                          std::vector<std::shared_ptr<Certificate>>());
+                  std::vector<ndn::Name> redirectionItems = std::vector<ndn::Name>());
 
 std::multimap<std::string, std::string>
 decodeApplicationParameters(const Block& block);