diff --git a/src/security/command-interest-signer.cpp b/src/security/command-interest-signer.cpp
index 1dfe1ce..0d2f82f 100644
--- a/src/security/command-interest-signer.cpp
+++ b/src/security/command-interest-signer.cpp
@@ -25,6 +25,11 @@
 namespace ndn {
 namespace security {
 
+CommandInterestPreparer::CommandInterestPreparer()
+  : m_lastUsedTimestamp(0)
+{
+}
+
 Name
 CommandInterestPreparer::prepareCommandInterestName(Name name)
 {
diff --git a/src/security/command-interest-signer.hpp b/src/security/command-interest-signer.hpp
index 7033b3f..6c5e2ce 100644
--- a/src/security/command-interest-signer.hpp
+++ b/src/security/command-interest-signer.hpp
@@ -41,6 +41,8 @@
 class CommandInterestPreparer : noncopyable
 {
 public:
+  CommandInterestPreparer();
+
   /**
    * @brief Prepare name of the CommandInterest
    *
diff --git a/tests/unit-tests/util/in-memory-storage-common.t.cpp b/tests/unit-tests/util/in-memory-storage-common.t.cpp
index 802b2f7..a4a992b 100644
--- a/tests/unit-tests/util/in-memory-storage-common.t.cpp
+++ b/tests/unit-tests/util/in-memory-storage-common.t.cpp
@@ -277,12 +277,12 @@
   ConstBufferPtr digest1 = crypto::computeSha256Digest(data->wireEncode().wire(), data->wireEncode().size());
   BOOST_CHECK_EQUAL(digest1->size(), 32);
 
-  InMemoryStorageEntry* entry = new InMemoryStorageEntry();
-  entry->setData(*data);
+  InMemoryStorageEntry entry;
+  entry.setData(*data);
 
   BOOST_CHECK_EQUAL_COLLECTIONS(digest1->begin(), digest1->end(),
-                                entry->getFullName()[-1].value_begin(),
-                                entry->getFullName()[-1].value_end());
+                                entry.getFullName()[-1].value_begin(),
+                                entry.getFullName()[-1].value_end());
 }
 
 BOOST_AUTO_TEST_CASE_TEMPLATE(Iterator, T, InMemoryStorages)