diff --git a/lib/libc/string/memcpy.3 b/lib/libc/string/memcpy.3
index 5ce43d5dfe75..4207ccb018c1 100644
--- a/lib/libc/string/memcpy.3
+++ b/lib/libc/string/memcpy.3
@@ -1,87 +1,98 @@
 .\" Copyright (c) 1990, 1991, 1993
 .\"	The Regents of the University of California.  All rights reserved.
 .\"
 .\" This code is derived from software contributed to Berkeley by
 .\" Chris Torek and the American National Standards Committee X3,
 .\" on Information Processing Systems.
 .\"
 .\" Redistribution and use in source and binary forms, with or without
 .\" modification, are permitted provided that the following conditions
 .\" are met:
 .\" 1. Redistributions of source code must retain the above copyright
 .\"    notice, this list of conditions and the following disclaimer.
 .\" 2. Redistributions in binary form must reproduce the above copyright
 .\"    notice, this list of conditions and the following disclaimer in the
 .\"    documentation and/or other materials provided with the distribution.
 .\" 3. Neither the name of the University nor the names of its contributors
 .\"    may be used to endorse or promote products derived from this software
 .\"    without specific prior written permission.
 .\"
 .\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 .\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 .\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 .\" ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 .\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 .\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 .\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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 .\"
 .\"     @(#)memcpy.3	8.1 (Berkeley) 6/4/93
 .\"
-.Dd July 14, 2021
+.Dd November 18, 2023
 .Dt MEMCPY 3
 .Os
 .Sh NAME
 .Nm memcpy
 .Nd copy byte string
 .Sh LIBRARY
 .Lb libc
 .Sh SYNOPSIS
 .In string.h
 .Ft void *
 .Fn memcpy "void *dst" "const void *src" "size_t len"
 .Ft void *
 .Fn mempcpy "void *dst" "const void *src" "size_t len"
 .Sh DESCRIPTION
 The
 .Fn memcpy
 and
 .Fn mempcpy
 functions
 copy
 .Fa len
 bytes from string
 .Fa src
 to string
 .Fa dst .
 If
 .Fa src
 and
 .Fa dst
 overlap, the results are not defined.
 .Sh RETURN VALUES
 The
 .Fn memcpy
 function
 returns the original value of
 .Fa dst .
 .Pp
 The
 .Fn mempcpy
 function returns a pointer to the byte after the last written byte.
 .Sh SEE ALSO
 .Xr bcopy 3 ,
 .Xr memccpy 3 ,
 .Xr memmove 3 ,
 .Xr strcpy 3 ,
-.Xr wmemcpy 3
+.Xr wmemcpy 3 ,
 .Xr wmempcpy 3
 .Sh STANDARDS
 The
 .Fn memcpy
 function
 conforms to
 .St -isoC .
+.Sh HISTORY
+The
+.Fn memcpy
+function first appeared in
+.At V
+and was reimplemented for
+.Bx 4.3 Tahoe .
+The
+.Fn mempcpy
+function first appeared in
+.Fx 13.1 .