diff --git a/utils/tracers/ndn-l3-aggregate-tracer.cpp b/utils/tracers/ndn-l3-aggregate-tracer.cpp
index 5a2d662..556a792 100644
--- a/utils/tracers/ndn-l3-aggregate-tracer.cpp
+++ b/utils/tracers/ndn-l3-aggregate-tracer.cpp
@@ -18,17 +18,17 @@
  * Author:  Alexander Afanasyev <alexander.afanasyev@ucla.edu>
  */
 
-#include "ndn-l3-aggregate-tracer.h"
+#include "ndn-l3-aggregate-tracer.hpp"
 
 #include "ns3/node.h"
 #include "ns3/packet.h"
 #include "ns3/config.h"
 #include "ns3/callback.h"
-#include "ns3/ndn-app.h"
-#include "ns3/ndn-face.h"
-#include "ns3/ndn-interest.h"
-#include "ns3/ndn-data.h"
-#include "ns3/ndn-pit-entry.h"
+#include "ns3/ndn-app.hpp"
+#include "ns3/ndn-face.hpp"
+#include "ns3/ndn-interest.hpp"
+#include "ns3/ndn-data.hpp"
+#include "ns3/ndn-pit-entry.hpp"
 
 #include "ns3/simulator.h"
 #include "ns3/node-list.h"