Index: bin/nproc/nproc.1
===================================================================
--- bin/nproc/nproc.1
+++ bin/nproc/nproc.1
@@ -3,7 +3,7 @@
 .\"
 .\" * SPDX-License-Identifier: BSD-2-Clause
 .\"
-.Dd February 5, 2023
+.Dd February 15, 2023
 .Dt NPROC 1
 .Os
 .Sh NAME
@@ -40,6 +40,11 @@
 .El
 .Sh COMPATIBILITY
 This program is intended to be compatible with nproc as found in GNU coreutils.
+.Sh BUGS
+If HyperThreading is enabled in BIOS, but disabled in the kernel, the
+.Fl -all
+option on Linux will still report all possible CPU threads.
+FreeBSD will only report ones which got activated.
 .Sh SEE ALSO
 .Xr cpuset 1
 .Sh HISTORY