diff --git a/misc-utils/cal.1 b/misc-utils/cal.1
index e4789d9cd..f1b97193f 100644
--- a/misc-utils/cal.1
+++ b/misc-utils/cal.1
@@ -89,6 +89,9 @@ Display Sunday as the first day of the week.
 \fB\-m\fR, \fB\-\-monday\fR
 Display Monday as the first day of the week.
 .TP
+\fB\-v\fR, \fB\-\-vertical\fR
+Display using a vertical layout (aka ncal mode).
+.TP
 .B \-\-iso
 Display the proleptic Gregorian calendar exclusively.  This option does not affect
 week numbers and the first day of the week.