--- a/src/uan/model/acoustic-modem-energy-model.cc	Thu Oct 02 21:05:15 2014 -0700
+++ b/src/uan/model/acoustic-modem-energy-model.cc	Thu Oct 02 21:17:48 2014 -0700
@@ -65,7 +65,8 @@
                    MakeDoubleChecker<double> ())
     .AddTraceSource ("TotalEnergyConsumption",
                      "Total energy consumption of the modem device.",
-                     MakeTraceSourceAccessor (&AcousticModemEnergyModel::m_totalEnergyConsumption))
+                     MakeTraceSourceAccessor (&AcousticModemEnergyModel::m_totalEnergyConsumption),
+                     "ns3::TracedValue::DoubleCallback")
   ;
   return tid;
 }