diff --git a/usr.sbin/usbdump/usbdump.8 b/usr.sbin/usbdump/usbdump.8
--- a/usr.sbin/usbdump/usbdump.8
+++ b/usr.sbin/usbdump/usbdump.8
@@ -135,22 +135,27 @@
 .Nm
 is as follows:
 .Pp
-.Dl <time> <bus>.<addr> <type>-<xfertype>-EP-<endoint>,\\\ 
+.Bl -literal -offset indent -compact
+<time> <bus>.<addr> <type>-<xfertype>-EP-<endoint>,\e
 SPD=<speed>,NFR=<frames>,SLEN=<len>,IVAL=<interval> [,<ERR=errnum>]
 .Pp
 The meaning of the output format elements is as follows:
 .Bl -tag -width "<xfertype>"
 .It <time>
 A timestamp preceding all output lines.
-The timestamp has the format "hh:mm:ss.frac" and is as accurate as
+The timestamp has the format
+.Dq hh:mm:ss.frac
+and is as accurate as
 the kernel's clock.
 .It <bus>
 The USB host controller's bus unit number.
 .It <addr>
 The unique number of the USB device as allocated by the host controller driver.
 .It <type>
-`SUBM' indicates a USB submit.
-`DONE' indicates a USB transfer done.
+.Sq SUBM
+indicates a USB submit.
+.Sq DONE
+indicates a USB transfer done.
 .It <xfertype>
 The USB transfer type.
 Can be
@@ -186,7 +191,7 @@
 If this is a USB done, its value is
 .Li xfer->actlen .
 .It <interval>
-Transfer interval for interrupt and iscoronous use, in milliseconds.
+Transfer interval for interrupt and isochronous use, in milliseconds.
 Its value is
 .Li up->up_interval .
 .It <,ERR=errnum>
@@ -196,5 +201,10 @@
 .El
 .Sh SEE ALSO
 .Xr usbconfig 8
+.Sh HISTORY
+The
+.Nm
+utility first appeared in
+.Fx 8.3 .
 .Sh AUTHORS
 .An Weongyo Jeong Aq Mt weongyo@FreeBSD.org