diff --git a/examples/custom-apps/custom-app.hpp b/examples/custom-apps/custom-app.hpp
index d1f85f7..86f7bb4 100644
--- a/examples/custom-apps/custom-app.hpp
+++ b/examples/custom-apps/custom-app.hpp
@@ -23,7 +23,7 @@
 #ifndef CUSTOM_APP_H_
 #define CUSTOM_APP_H_
 
-#include "ns3/ndn-app.h"
+#include "ns3/ndn-app.hpp"
 
 namespace ns3 {