diff --git a/src/name-assignments/assignment-hash.hpp b/src/name-assignments/assignment-hash.hpp
index 9054bb7..b0cf417 100644
--- a/src/name-assignments/assignment-hash.hpp
+++ b/src/name-assignments/assignment-hash.hpp
@@ -1,6 +1,22 @@
-//
-// Created by Tyler on 10/6/20.
-//
+/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
+/**
+ * Copyright (c) 2017-2020, Regents of the University of California.
+ *
+ * This file is part of ndncert, a certificate management system based on NDN.
+ *
+ * ndncert is free software: you can redistribute it and/or modify it under the terms
+ * of the GNU General Public License as published by the Free Software Foundation, either
+ * version 3 of the License, or (at your option) any later version.
+ *
+ * ndncert is distributed in the hope that it will be useful, but WITHOUT ANY
+ * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
+ * PARTICULAR PURPOSE.  See the GNU General Public License for more details.
+ *
+ * You should have received copies of the GNU General Public License along with
+ * ndncert, e.g., in COPYING.md file.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * See AUTHORS.md for complete list of ndncert authors and contributors.
+ */
 
 #ifndef NDNCERT_ASSIGNMENT_HASH_HPP
 #define NDNCERT_ASSIGNMENT_HASH_HPP
@@ -13,7 +29,7 @@
 /**
  * assign names base on client probe parameter
  */
-class AssignmentHash: public NameAssignmentFuncFactory {
+class AssignmentHash: public NameAssignmentFunc {
 public:
   AssignmentHash(const std::string& format = "");