--- a/src/internet/model/ipv4-packet-info-tag.h	Wed Jul 06 18:51:12 2011 -0400
+++ b/src/internet/model/ipv4-packet-info-tag.h	Thu Jul 07 04:31:52 2011 -0400
@@ -18,8 +18,8 @@
  * Authors: Hajime Tazaki <tazaki@sfc.wide.ad.jp>
  */
 
-#ifndef __IPV4_PACKET_INFO_TAG_H__
-#define __IPV4_PACKET_INFO_TAG_H__
+#ifndef IPV4_PACKET_INFO_TAG_H
+#define IPV4_PACKET_INFO_TAG_H
 
 #include "ns3/tag.h"
 #include "ns3/ipv4-address.h"
@@ -86,5 +86,4 @@
 };
 } //namespace ns3
 
-#endif /* __IPV4_PACKET_INFO_TAG_H__ */
-
+#endif /* IPV4_PACKET_INFO_TAG_H */