diff --git a/man/man8/zfs-mount.8 b/man/man8/zfs-mount.8
index 40229cc0b..5e922f84b 100644
--- a/man/man8/zfs-mount.8
+++ b/man/man8/zfs-mount.8
@@ -30,7 +30,7 @@
 .\" Copyright 2018 Nexenta Systems, Inc.
 .\" Copyright 2019 Joyent, Inc.
 .\"
-.Dd June 30, 2019
+.Dd February 16, 2019
 .Dt ZFS-MOUNT 8
 .Os Linux
 .Sh NAME
@@ -117,6 +117,7 @@ Unmount all available ZFS file systems.
 Invoked automatically as part of the shutdown process.
 .It Fl f
 Forcefully unmount the file system, even if it is currently in use.
+This option is not supported on Linux.
 .It Fl u
 Unload keys for any encryption roots unmounted by this command.
 .It Ar filesystem Ns | Ns Ar mountpoint
diff --git a/man/man8/zpool-export.8 b/man/man8/zpool-export.8
index 1247e12d5..32e36799c 100644
--- a/man/man8/zpool-export.8
+++ b/man/man8/zpool-export.8
@@ -27,7 +27,7 @@
 .\" Copyright 2017 Nexenta Systems, Inc.
 .\" Copyright (c) 2017 Open-E, Inc. All Rights Reserved.
 .\"
-.Dd August 9, 2019
+.Dd February 16, 2020
 .Dt ZPOOL-EXPORT 8
 .Os Linux
 .Sh NAME
@@ -72,6 +72,7 @@ Exports all pools imported on the system.
 Forcefully unmount all datasets, using the
 .Nm unmount Fl f
 command.
+This option is not supported on Linux.
 .Pp
 This command will forcefully export the pool even if it has a shared spare that
 is currently being used.