diff -r 597a9ec89e60 -r 2d29fee2b7b8 src/internet/model/ipv4-interface.cc
--- a/src/internet/model/ipv4-interface.cc	Fri Sep 26 12:44:13 2014 -0700
+++ b/src/internet/model/ipv4-interface.cc	Fri Sep 26 15:51:00 2014 -0700
@@ -30,9 +30,9 @@
 #include "ns3/node.h"
 #include "ns3/pointer.h"
 
-NS_LOG_COMPONENT_DEFINE ("Ipv4Interface");
+namespace ns3 {
 
-namespace ns3 {
+NS_LOG_COMPONENT_DEFINE ("Ipv4Interface");
 
 NS_OBJECT_ENSURE_REGISTERED (Ipv4Interface);