diff --git a/utils/tracers/ndn-app-delay-tracer.cc b/utils/tracers/ndn-app-delay-tracer.cc
index c84f176..6ed3e87 100644
--- a/utils/tracers/ndn-app-delay-tracer.cc
+++ b/utils/tracers/ndn-app-delay-tracer.cc
@@ -115,7 +115,7 @@
   Config::ConnectWithoutContext ("/NodeList/"+m_node+"/ApplicationList/*/LastRetransmittedInterestDataDelay",
                                  MakeCallback (&AppDelayTracer::LastRetransmittedInterestDataDelay, this));
 
-  Config::ConnectWithoutContext ("/NodeList/"+m_node+"/ApplicationList/*/LastRetransmittedInterestDataDelay",
+  Config::ConnectWithoutContext ("/NodeList/"+m_node+"/ApplicationList/*/FirstInterestDataDelay",
                                  MakeCallback (&AppDelayTracer::FirstInterestDataDelay, this));
 }