--- a/src/mobility/helper/mobility-helper.cc	Fri Sep 26 12:44:13 2014 -0700
+++ b/src/mobility/helper/mobility-helper.cc	Fri Sep 26 15:51:00 2014 -0700
@@ -29,9 +29,9 @@
 #include "ns3/string.h"
 #include <iostream>
 
-NS_LOG_COMPONENT_DEFINE ("MobilityHelper");
+namespace ns3 {
 
-namespace ns3 {
+NS_LOG_COMPONENT_DEFINE ("MobilityHelper");
 
 MobilityHelper::MobilityHelper ()
 {