diff --git a/utils/tracers/ndn-l3-aggregate-tracer.cc b/utils/tracers/ndn-l3-aggregate-tracer.cc
index c6fc5e3..5a2d662 100644
--- a/utils/tracers/ndn-l3-aggregate-tracer.cc
+++ b/utils/tracers/ndn-l3-aggregate-tracer.cc
@@ -50,6 +50,12 @@
 }
 
 void
+L3AggregateTracer::Destroy ()
+{
+  g_tracers.clear ();
+}
+
+void
 L3AggregateTracer::InstallAll (const std::string &file, Time averagingPeriod/* = Seconds (0.5)*/)
 {
   using namespace boost;