diff --git a/utils/tracers/ndn-l3-rate-tracer.cc b/utils/tracers/ndn-l3-rate-tracer.cc
index 435a652..7951213 100644
--- a/utils/tracers/ndn-l3-rate-tracer.cc
+++ b/utils/tracers/ndn-l3-rate-tracer.cc
@@ -53,6 +53,12 @@
 }
 
 void
+L3RateTracer::Destroy ()
+{
+  g_tracers.clear ();
+}
+
+void
 L3RateTracer::InstallAll (const std::string &file, Time averagingPeriod/* = Seconds (0.5)*/)
 {
   std::list<Ptr<L3RateTracer> > tracers;