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diff --git a/src/lib/libcrypto/man/CRYPTO_get_mem_functions.3 b/src/lib/libcrypto/man/CRYPTO_get_mem_functions.3
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+.\"     $OpenBSD: CRYPTO_get_mem_functions.3,v 1.1 2016/11/29 18:16:09 deraadt Exp $
+.\"
+.\" Copyright (c) 2016 Ingo Schwarze <schwarze@openbsd.org>
+.\"
+.\" Permission to use, copy, modify, and distribute this software for any
+.\" purpose with or without fee is hereby granted, provided that the above
+.\" copyright notice and this permission notice appear in all copies.
+.\"
+.\" THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+.\" WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+.\" MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+.\" ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+.\" WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+.\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+.\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+.\"
+.Dd $Mdocdate: November 29 2016 $
+.Dt CRYPTO_get_mem_functions 3
+.Os
+.Sh NAME
+.Nm CRYPTO_get_mem_functions ,
+.Nm CRYPTO_set_mem_functions ,
+.Nm CRYPTO_mem_ctrl ,
+.Nm CRYPTO_mem_leaks ,
+.Nm CRYPTO_mem_leaks_fp
+.Nd legacy OpenSSL memory allocation control
+.Sh SYNOPSIS
+.In openssl/crypto.h
+.Ft void
+.Fo CRYPTO_get_mem_functions
+.Fa "void *(**m)(size_t)"
+.Fa "void *(**r)(void *, size_t)"
+.Fa "void (**f)(void *)"
+.Fc
+.Ft int
+.Fo CRYPTO_set_mem_functions
+.Fa "void *(*m)(size_t)"
+.Fa "void *(*r)(void *, size_t)"
+.Fa "void (*f)(void *)"
+.Fc
+.Ft int
+.Fo CRYPTO_mem_ctrl
+.Fa "int mode"
+.Fc
+.Ft void
+.Fo CRYPTO_mem_leaks
+.Fa "BIO *b"
+.Fc
+.Ft void
+.Fo CRYPTO_mem_leaks_fp
+.Fa "FILE *fp"
+.Fc
+.Sh DESCRIPTION
+Do not use any of the interfaces documented here.
+They are provided purely for compatibility with legacy application code.
+.Pp
+.Fn CRYPTO_get_mem_functions
+assigns pointers to the C library functions
+.Xr malloc 3 ,
+.Xr realloc 3 ,
+and
+.Xr free 3
+to those of its arguments that are not
+.Dv NULL.
+.Pp
+.Fn CRYPTO_set_mem_functions ,
+.Fn CRYPTO_mem_ctrl ,
+.Fn CRYPTO_mem_leaks ,
+and
+.Fn CRYPTO_mem_leaks_fp
+have no effect.
+.Sh RETURN VALUES
+.Pp
+.Fn CRYPTO_set_mem_functions
+always returns 0.
+.Pp
+.Fn CRYPTO_mem_ctrl
+always returns
+.Dv CRYPTO_MEM_CHECK_OFF .