--- a/trunk/man/sendfax.1
+++ b/trunk/man/sendfax.1
@@ -510,6 +510,7 @@
 usecolor        string            whether or not to use color ("yes"/"no") and only color ("only")
 config          string            override configuration with this setting
 timezone        string            time zone locale setting to use in tagline formatting
+probeonly       integer           "1" terminates once a fax call is established, "2" when handshaking received
 .sp .5
 .fi
 .TP 12