diff --git a/usr.sbin/diskinfo/diskinfo.8 b/usr.sbin/diskinfo/diskinfo.8
index 9c7c1316dcc0..fd5bfabfb75f 100644
--- a/usr.sbin/diskinfo/diskinfo.8
+++ b/usr.sbin/diskinfo/diskinfo.8
@@ -28,7 +28,7 @@
 .\"
 .\" $FreeBSD$
 .\"
-.Dd April 9, 2003
+.Dd November 9, 2004
 .Dt DISKINFO 8
 .Os
 .Sh NAME
@@ -36,7 +36,7 @@
 .Nd get information about disk device
 .Sh SYNOPSIS
 .Nm
-.Op Fl tv
+.Op Fl ctv
 .Ar disk ...
 .Sh DESCRIPTION
 The
diff --git a/usr.sbin/diskinfo/diskinfo.c b/usr.sbin/diskinfo/diskinfo.c
index 3ad2a55e5bdb..2f033b69793f 100644
--- a/usr.sbin/diskinfo/diskinfo.c
+++ b/usr.sbin/diskinfo/diskinfo.c
@@ -44,7 +44,7 @@
 static void
 usage(void)
 {
-	fprintf(stderr, "usage: diskinfo [-tv] disk ...\n");
+	fprintf(stderr, "usage: diskinfo [-ctv] disk ...\n");
 	exit (1);
 }