diff --git a/src/ims/in-memory-storage-entry.cpp b/src/ims/in-memory-storage-entry.cpp
new file mode 100644
index 0000000..daf12c5
--- /dev/null
+++ b/src/ims/in-memory-storage-entry.cpp
@@ -0,0 +1,57 @@
+/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
+/*
+ * Copyright (c) 2013-2017 Regents of the University of California.
+ *
+ * This file is part of ndn-cxx library (NDN C++ library with eXperimental eXtensions).
+ *
+ * ndn-cxx library is free software: you can redistribute it and/or modify it under the
+ * terms of the GNU Lesser General Public License as published by the Free Software
+ * Foundation, either version 3 of the License, or (at your option) any later version.
+ *
+ * ndn-cxx library 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 Lesser General Public License for more details.
+ *
+ * You should have received copies of the GNU General Public License and GNU Lesser
+ * General Public License along with ndn-cxx, e.g., in COPYING.md file.  If not, see
+ * <http://www.gnu.org/licenses/>.
+ *
+ * See AUTHORS.md for complete list of ndn-cxx authors and contributors.
+ */
+
+#include "in-memory-storage-entry.hpp"
+
+namespace ndn {
+
+InMemoryStorageEntry::InMemoryStorageEntry()
+  : m_isFresh(true)
+{
+}
+
+void
+InMemoryStorageEntry::release()
+{
+  m_dataPacket.reset();
+  m_markStaleEventId.reset();
+}
+
+void
+InMemoryStorageEntry::setData(const Data& data)
+{
+  m_dataPacket = data.shared_from_this();
+  m_isFresh = true;
+}
+
+void
+InMemoryStorageEntry::setMarkStaleEventId(unique_ptr<util::scheduler::ScopedEventId> markStaleEventId)
+{
+  m_markStaleEventId = std::move(markStaleEventId);
+}
+
+void
+InMemoryStorageEntry::markStale()
+{
+  m_isFresh = false;
+}
+
+} // namespace ndn