diff --git a/man/man8/zfsprops.8 b/man/man8/zfsprops.8
index ec7d5d2787..0f2990b430 100644
--- a/man/man8/zfsprops.8
+++ b/man/man8/zfsprops.8
@@ -38,7 +38,7 @@
 .\" Copyright 2019 Joyent, Inc.
 .\" Copyright (c) 2019, Kjeld Schouten-Lebbing
 .\"
-.Dd September 1, 2020
+.Dd May 24, 2021
 .Dt ZFSPROPS 8
 .Os
 .Sh NAME
@@ -1197,15 +1197,10 @@ location.
 .It Sy nbmand Ns = Ns Sy on Ns | Ns Sy off
 Controls whether the file system should be mounted with
 .Sy nbmand
-.Pq Non Blocking mandatory locks .
+.Pq Non-blocking mandatory locks .
 This is used for SMB clients.
 Changes to this property only take effect when the file system is umounted and
-remounted.
-See
-.Xr mount 8
-for more information on
-.Sy nbmand
-mounts. This property is not used on Linux.
+remounted. Support for these locks is scarce and not described by POSIX.
 .It Sy overlay Ns = Ns Sy on Ns | Ns Sy off
 Allow mounting on a busy directory or a directory which already contains
 files or directories.