diff --git a/src/profile-data.h b/src/profile-data.h
index 46a926d..47fe910 100644
--- a/src/profile-data.h
+++ b/src/profile-data.h
@@ -8,11 +8,14 @@
  * Author: Yingdi Yu <yingdi@cs.ucla.edu>
  */
 
-#ifndef LINKNDN_PROFILE_DATA_H
-#define LINKNDN_PROFILE_DATA_H
+#ifndef CHRONOS_PROFILE_DATA_H
+#define CHRONOS_PROFILE_DATA_H
 
-#include <ndn-cpp-dev/data.hpp>
 #include "profile.h"
+#include <ndn-cpp-dev/data.hpp>
+
+
+namespace chronos{
 
 class ProfileData : public ndn::Data
 {
@@ -23,8 +26,6 @@
 
   ProfileData(const Profile& profile);
 
-  // ProfileData(const ProfileData& profileData);
-
   ProfileData(const ndn::Data& data);
 
   ~ProfileData() {}
@@ -42,4 +43,6 @@
   Profile m_profile;
 };
 
+}//chronos
+
 #endif