diff --git a/beadm.1 b/beadm.1
index 508a2c3..9b94b9b 100644
--- a/beadm.1
+++ b/beadm.1
@@ -48,6 +48,10 @@ mount
 rename
 .Ao Ar origBeName Ac
 .Ao Ar newBeName Ac
+.Nm
+{ umount | unmount }
+.Op Fl f
+.Ao Ar beName Ac
 .Sh DESCRIPTION
 The
 .Nm
@@ -118,6 +122,15 @@ Renames the given nonactive
 to the given
 .Ar newBeName
 .Pp
+.It Ic umount
+.Op Fl f
+.Ao Ar beName Ac
+.Pp
+Unmount the given boot environment, if it is mounted.
+Specifying
+.Fl f
+will force the unmount if busy.
+.Pp
 .El
 .Sh EXAMPLES
 .Bl -bullet