diff --git a/src/storage/sqlite-storage.hpp b/src/storage/sqlite-storage.hpp
index 4d7142b..217f9d0 100644
--- a/src/storage/sqlite-storage.hpp
+++ b/src/storage/sqlite-storage.hpp
@@ -1,6 +1,6 @@
 /* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
-/**
- * Copyright (c) 2018,  Regents of the University of California.
+/*
+ * Copyright (c) 2014-2019, Regents of the University of California.
  *
  * This file is part of NDN repo-ng (Next generation of NDN repository).
  * See AUTHORS.md for complete list of repo-ng authors and contributors.
@@ -74,6 +74,9 @@
   std::shared_ptr<Data>
   find(const Name& name, bool exactMatch = false) override;
 
+  void
+  forEach(const std::function<void(const Name&)>& f) override;
+
   /**
    *  @brief  return the size of database
    */