src: One more set of renaming: ndn-content-object.h|cc is renamed to ndn-data.h|cc
diff --git a/helper/ndn-header-helper.cc b/helper/ndn-header-helper.cc
index 97d282a..edb5af8 100644
--- a/helper/ndn-header-helper.cc
+++ b/helper/ndn-header-helper.cc
@@ -26,7 +26,7 @@
 #include "ns3/object.h"
 
 #include "ns3/ndn-interest.h"
-#include "ns3/ndn-content-object.h"
+#include "ns3/ndn-data.h"
 #include <iomanip>
 
 NS_LOG_COMPONENT_DEFINE ("ndn.HeaderHelper");