--- mandoc.1.orig	2015-07-07 11:10:38.756334000 -0600
+++ mandoc.1	2015-07-07 11:16:08.358326000 -0600
@@ -23,7 +23,7 @@
 .Sh SYNOPSIS
 .Nm mandoc
 .Op Fl V
-.Op Fl m Ns Ar format
+.Op Fl mdoc Ns | Ns Fl man Ns | Ns Fl mandoc
 .Op Fl O Ns Ar option
 .Op Fl T Ns Ar output
 .Op Fl W Ns Ar level
@@ -49,7 +49,7 @@
 .Pp
 The arguments are as follows:
 .Bl -tag -width Ds
-.It Fl m Ns Ar format
+.It Fl mdoc Ns | Ns Fl man Ns | Ns Fl mandoc
 Input format.
 See
 .Sx Input Formats