diff --git a/utils/tracers/ndn-app-delay-tracer.cc b/utils/tracers/ndn-app-delay-tracer.cc
index b48d744..230be84 100644
--- a/utils/tracers/ndn-app-delay-tracer.cc
+++ b/utils/tracers/ndn-app-delay-tracer.cc
@@ -27,7 +27,7 @@
 
 #include "ns3/ndn-app.h"
 #include "ns3/ndn-interest.h"
-#include "ns3/ndn-content-object.h"
+#include "ns3/ndn-data.h"
 #include "ns3/simulator.h"
 #include "ns3/node-list.h"
 #include "ns3/log.h"
diff --git a/utils/tracers/ndn-cs-tracer.cc b/utils/tracers/ndn-cs-tracer.cc
index bf7df69..40aed8f 100644
--- a/utils/tracers/ndn-cs-tracer.cc
+++ b/utils/tracers/ndn-cs-tracer.cc
@@ -28,7 +28,7 @@
 
 #include "ns3/ndn-app.h"
 #include "ns3/ndn-interest.h"
-#include "ns3/ndn-content-object.h"
+#include "ns3/ndn-data.h"
 #include "ns3/simulator.h"
 #include "ns3/node-list.h"
 #include "ns3/log.h"
diff --git a/utils/tracers/ndn-l3-aggregate-tracer.cc b/utils/tracers/ndn-l3-aggregate-tracer.cc
index 050e63b..e977285 100644
--- a/utils/tracers/ndn-l3-aggregate-tracer.cc
+++ b/utils/tracers/ndn-l3-aggregate-tracer.cc
@@ -27,7 +27,7 @@
 #include "ns3/ndn-app.h"
 #include "ns3/ndn-face.h"
 #include "ns3/ndn-interest.h"
-#include "ns3/ndn-content-object.h"
+#include "ns3/ndn-data.h"
 #include "ns3/ndn-pit-entry.h"
 
 #include "ns3/simulator.h"
diff --git a/utils/tracers/ndn-l3-rate-tracer.cc b/utils/tracers/ndn-l3-rate-tracer.cc
index 3d9a1f4..43f8f0a 100644
--- a/utils/tracers/ndn-l3-rate-tracer.cc
+++ b/utils/tracers/ndn-l3-rate-tracer.cc
@@ -30,7 +30,7 @@
 #include "ns3/ndn-app.h"
 #include "ns3/ndn-face.h"
 #include "ns3/ndn-interest.h"
-#include "ns3/ndn-content-object.h"
+#include "ns3/ndn-data.h"
 #include "ns3/ndn-pit-entry.h"
 
 #include <fstream>
diff --git a/utils/tracers/ndn-l3-tracer.cc b/utils/tracers/ndn-l3-tracer.cc
index bd45113..47e67a4 100644
--- a/utils/tracers/ndn-l3-tracer.cc
+++ b/utils/tracers/ndn-l3-tracer.cc
@@ -30,7 +30,7 @@
 
 #include "ns3/ndn-face.h"
 #include "ns3/ndn-interest.h"
-#include "ns3/ndn-content-object.h"
+#include "ns3/ndn-data.h"
 #include "ns3/ndn-pit-entry.h"
 
 using namespace std;