diff --git a/model/ndn-common.hpp b/model/ndn-common.hpp
index 6489981..97e722a 100644
--- a/model/ndn-common.hpp
+++ b/model/ndn-common.hpp
@@ -31,12 +31,18 @@
 #include <ndn-cxx/data.hpp>
 #include <ndn-cxx/security/key-chain.hpp>
 
+#include <ndn-cxx/util/time.hpp>
+
 namespace ns3 {
 namespace ndn {
 
 using ::ndn::Name;
 namespace name = ::ndn::name;
 
+namespace time = ::ndn::time;
+
+using ::ndn::Exclude;
+
 using std::shared_ptr;
 using std::make_shared;