diff --git a/helper/ccnx-decoding-helper.cc b/helper/ccnx-decoding-helper.cc
index cb38f98..52061ab 100644
--- a/helper/ccnx-decoding-helper.cc
+++ b/helper/ccnx-decoding-helper.cc
@@ -27,6 +27,8 @@
 #include "ns3/ccnb-parser-content-object-visitor.h"
 #include "ns3/ccnb-parser-block.h"
 
+#include "ns3/ccnb-parser-dtag.h"
+
 namespace ns3 {
 
 size_t