-.\" @(#) $Header: /tcpdump/master/tcpdump/Attic/tcpdump.1,v 1.158 2004-01-22 09:35:50 hannes Exp $ (LBL)
+.\" @(#) $Header: /tcpdump/master/tcpdump/Attic/tcpdump.1,v 1.159 2004-01-22 09:51:31 hannes Exp $ (LBL)
.\"
.\" $NetBSD: tcpdump.8,v 1.9 2003/03/31 00:18:17 perry Exp $
.\"
.I user
and the group ID to the primary group of
.IR user .
+.IP
+This behavior can also be enabled by default at compile time.
.IP "\fI expression\fP"
.RS
selects which packets will be dumped.