diff --git a/apps/ndn-producer.cpp b/apps/ndn-producer.cpp
index cbe4a39..605b082 100644
--- a/apps/ndn-producer.cpp
+++ b/apps/ndn-producer.cpp
@@ -19,19 +19,19 @@
  *         Alexander Afanasyev <alexander.afanasyev@ucla.edu>
  */
 
-#include "ndn-producer.h"
+#include "ndn-producer.hpp"
 #include "ns3/log.h"
-#include "ns3/ndn-interest.h"
-#include "ns3/ndn-data.h"
+#include "ns3/ndn-interest.hpp"
+#include "ns3/ndn-data.hpp"
 #include "ns3/string.h"
 #include "ns3/uinteger.h"
 #include "ns3/packet.h"
 #include "ns3/simulator.h"
 
-#include "ns3/ndn-app-face.h"
-#include "ns3/ndn-fib.h"
+#include "ns3/ndn-app-face.hpp"
+#include "ns3/ndn-fib.hpp"
 
-#include "ns3/ndnSIM/utils/ndn-fw-hop-count-tag.h"
+#include "ns3/ndnSIM/utils/ndn-fw-hop-count-tag.hpp"
 
 #include <boost/ref.hpp>
 #include <boost/lambda/lambda.hpp>