diff --git a/src/tlv/lsa-info.cpp b/src/tlv/lsa-info.cpp
index 5349c31..e81bdc9 100644
--- a/src/tlv/lsa-info.cpp
+++ b/src/tlv/lsa-info.cpp
@@ -170,5 +170,21 @@
   return os;
 }
 
+std::shared_ptr<LsaInfo>
+makeLsaInfo(const Lsa& lsa)
+{
+  std::shared_ptr<LsaInfo> lsaInfo = std::make_shared<LsaInfo>();
+
+  lsaInfo->setOriginRouter(lsa.getOrigRouter());
+  lsaInfo->setSequenceNumber(lsa.getLsSeqNo());
+
+  ndn::time::system_clock::duration duration
+    = lsa.getExpirationTimePoint() - ndn::time::system_clock::now();
+
+  lsaInfo->setExpirationPeriod(ndn::time::duration_cast<ndn::time::milliseconds>(duration));
+
+  return lsaInfo;
+}
+
 } // namespace tlv
 } // namespace nlsr
diff --git a/src/tlv/lsa-info.hpp b/src/tlv/lsa-info.hpp
index a5cf7bf..0cb186c 100644
--- a/src/tlv/lsa-info.hpp
+++ b/src/tlv/lsa-info.hpp
@@ -28,6 +28,8 @@
 #include <ndn-cxx/encoding/tlv.hpp>
 #include <ndn-cxx/name.hpp>
 
+#include "lsa.hpp"
+
 namespace nlsr {
 namespace tlv  {
 
@@ -134,6 +136,9 @@
 std::ostream&
 operator<<(std::ostream& os, const LsaInfo& lsaInfo);
 
+std::shared_ptr<LsaInfo>
+makeLsaInfo(const Lsa& lsa);
+
 } // namespace tlv
 } // namespace nlsr