Index: sbin/gvinum/gvinum.8
===================================================================
--- sbin/gvinum/gvinum.8
+++ sbin/gvinum/gvinum.8
@@ -28,7 +28,7 @@
 .\"
 .\" $FreeBSD$
 .\"
-.Dd May 6, 2014
+.Dd March 25, 2021
 .Dt GVINUM 8
 .Os
 .Sh NAME
@@ -38,6 +38,13 @@
 .Nm
 .Op Ar command
 .Op Fl options
+.Sh DEPRECATION NOTICE
+.Nm
+and associated
+.Xr geom 4
+kernel support is deprecated, and may not be available in
+.Fx 14.0
+and later.
 .Sh COMMANDS
 .Bl -tag -width indent
 .It Ic attach Ar plex volume Op Cm rename