diff --git a/apps/ccnx-consumer-window.h b/apps/ccnx-consumer-window.h
index 716608d..c3b0ddf 100644
--- a/apps/ccnx-consumer-window.h
+++ b/apps/ccnx-consumer-window.h
@@ -72,7 +72,7 @@
   
 protected:
   TracedValue<uint32_t> m_window;
-  uint32_t m_inFlight;
+  TracedValue<uint32_t> m_inFlight;
 };
 
 } // namespace ns3