diff --git a/examples/custom-apps/custom-app.hpp b/examples/custom-apps/custom-app.hpp
index 5d05e99..7dca200 100644
--- a/examples/custom-apps/custom-app.hpp
+++ b/examples/custom-apps/custom-app.hpp
@@ -23,6 +23,8 @@
 #ifndef CUSTOM_APP_H_
 #define CUSTOM_APP_H_
 
+#include "ns3/ndnSIM/model/ndn-common.hpp"
+
 #include "ns3/ndn-app.hpp"
 
 namespace ns3 {