1 files changed, 3 insertions, 0 deletions

diff --git a/src/lib/libc/net/rcmd.3 b/src/lib/libc/net/rcmd.3
index 8452e395db..add4faa314 100644
--- a/src/lib/libc/net/rcmd.3
+++ b/src/lib/libc/net/rcmd.3
@@ -134,6 +134,9 @@ by
 and several other functions.  Privileged Internet ports are those
 in the range 0 to 1023.  Only the super-user
 is allowed to bind an address of this sort to a socket.
+.Fn rresvport
+needs to be seeded with a port number; if that port
+is not available it will find another.
 .Pp
 The
 .Fn iruserok