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"