--- a/src/internet-stack/tcp-header.h	Fri Sep 12 11:34:25 2008 -0700
+++ b/src/internet-stack/tcp-header.h	Fri Sep 12 16:12:58 2008 -0700
@@ -31,6 +31,7 @@
 namespace ns3 {
 
 /**
+ * \ingroup tcp
  * \brief Header for the Transmission Control Protocol
  *
  * This class has fields corresponding to those in a network TCP header