diff --git a/usr.bin/ktrdump/ktrdump.8 b/usr.bin/ktrdump/ktrdump.8
index 5bdd984fc2cc..573fd13a02f7 100644
--- a/usr.bin/ktrdump/ktrdump.8
+++ b/usr.bin/ktrdump/ktrdump.8
@@ -35,6 +35,7 @@
 .Nm
 .Op Fl cfqrt
 .Op Fl e Ar execfile
+.Op Fl i Ar ktrfile
 .Op Fl m Ar corefile
 .Op Fl o Ar outfile
 .Sh DESCRIPTION
@@ -54,6 +55,10 @@ Quiet mode; do not print the column header.
 Print relative timestamps rather than absolute timestamps.
 .It Fl t
 Print the timestamp for each entry.
+.It Fl i Ar ktrfile
+File containing saved ktr trace events; for more information see the
+.Xr ktr 4
+manual page.
 .It Fl e Ar execfile
 The kernel image to resolve symbols from.
 The default is the value returned via