diff --git a/examples/custom-apps/dumb-requester.hpp b/examples/custom-apps/dumb-requester.hpp
index 7b728c7..7a1272d 100644
--- a/examples/custom-apps/dumb-requester.hpp
+++ b/examples/custom-apps/dumb-requester.hpp
@@ -23,8 +23,8 @@
 #ifndef DUMB_REQUESTER_H_
 #define DUMB_REQUESTER_H_
 
-#include "ns3/ndn-app.h"
-#include "ns3/ndn-name.h"
+#include "ns3/ndn-app.hpp"
+#include "ns3/ndn-name.hpp"
 
 namespace ns3 {