--- a/src/wifi/model/mac-low.cc	Fri Sep 26 12:44:13 2014 -0700
+++ b/src/wifi/model/mac-low.cc	Fri Sep 26 15:51:00 2014 -0700
@@ -35,14 +35,14 @@
 #include "edca-txop-n.h"
 #include "snr-tag.h"
 
-NS_LOG_COMPONENT_DEFINE ("MacLow");
-
 #undef NS_LOG_APPEND_CONTEXT
 #define NS_LOG_APPEND_CONTEXT std::clog << "[mac=" << m_self << "] "
 
 
 namespace ns3 {
 
+NS_LOG_COMPONENT_DEFINE ("MacLow");
+
 MacLowTransmissionListener::MacLowTransmissionListener ()
 {
 }