--- a/src/internet/model/ipv6-interface.cc	Wed Jul 03 21:43:05 2013 +0200
+++ b/src/internet/model/ipv6-interface.cc	Wed Jul 03 14:43:10 2013 -0700
@@ -323,7 +323,7 @@
   /* check if destination is localhost (::1) */
   if (DynamicCast<LoopbackNetDevice> (m_device))
     {
-      /* XXX additional checks needed here (such as whether multicast
+      /** \todo additional checks needed here (such as whether multicast
        * goes to loopback)?
        */
       m_device->Send (p, m_device->GetBroadcast (), Ipv6L3Protocol::PROT_NUMBER);