diff --git a/include/ndn-cpp/security/identity/basic-identity-storage.hpp b/include/ndn-cpp/security/identity/basic-identity-storage.hpp
index ee1a886..d841548 100644
--- a/include/ndn-cpp/security/identity/basic-identity-storage.hpp
+++ b/include/ndn-cpp/security/identity/basic-identity-storage.hpp
@@ -200,7 +200,7 @@
 
   sqlite3 *database_;
 #if 0
-  Time lastUpdated_;
+  MillisecondsSince1970 lastUpdated_;
 #endif
 };