diff --git a/utils/tracers/ndn-app-delay-tracer.cc b/utils/tracers/ndn-app-delay-tracer.cc
index 6ed3e87..b02b3ac 100644
--- a/utils/tracers/ndn-app-delay-tracer.cc
+++ b/utils/tracers/ndn-app-delay-tracer.cc
@@ -128,7 +128,8 @@
 
      << "Type" << "\t"
      << "DelayS" << "\t"
-     << "DelayUS" << "\n";
+     << "DelayUS" << "\t"
+     << "RetxCount" << "";
 }
 
 void 
@@ -139,18 +140,20 @@
         << seqno << "\t"
         << "LastDelay" << "\t"
         << delay.ToDouble (Time::S) << "\t"
-        << delay.ToDouble (Time::US) << "\n";
+        << delay.ToDouble (Time::US) << "\t"
+        << 1 << "\n";
 }
   
 void 
-AppDelayTracer::FirstInterestDataDelay (Ptr<App> app, uint32_t seqno, Time delay)
+AppDelayTracer::FirstInterestDataDelay (Ptr<App> app, uint32_t seqno, Time delay, uint32_t retxCount)
 {
   *m_os << m_node << "\t"
         << app->GetId () << "\t"
         << seqno << "\t"
         << "FullDelay" << "\t"
         << delay.ToDouble (Time::S) << "\t"
-        << delay.ToDouble (Time::US) << "\n";
+        << delay.ToDouble (Time::US) << "\t"
+        << retxCount << "\n";
 }