--- a/src/wifi/model/dca-txop.h	Fri May 06 18:31:42 2011 +0200
+++ b/src/wifi/model/dca-txop.h	Fri May 06 18:34:24 2011 +0200
@@ -45,6 +45,7 @@
 
 /**
  * \brief handle packet fragmentation and retransmissions.
+ * \ingroup wifi
  *
  * This class implements the packet fragmentation and 
  * retransmission policy. It uses the ns3::MacLow and ns3::DcfManager