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diff --git a/doc/man3/BUF_MEM_new.pod b/doc/man3/BUF_MEM_new.pod
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+++ b/doc/man3/BUF_MEM_new.pod
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+=pod
+
+=head1 NAME
+
+BUF_MEM_new, BUF_MEM_new_ex, BUF_MEM_free, BUF_MEM_grow,
+BUF_MEM_grow_clean, BUF_reverse
+- simple character array structure
+
+=head1 SYNOPSIS
+
+ #include <openssl/buffer.h>
+
+ BUF_MEM *BUF_MEM_new(void);
+
+ BUF_MEM *BUF_MEM_new_ex(unsigned long flags);
+
+ void BUF_MEM_free(BUF_MEM *a);
+
+ int BUF_MEM_grow(BUF_MEM *str, int len);
+ size_t BUF_MEM_grow_clean(BUF_MEM *str, size_t len);
+
+ void BUF_reverse(unsigned char *out, const unsigned char *in, size_t size);
+
+=head1 DESCRIPTION
+
+The buffer library handles simple character arrays. Buffers are used for
+various purposes in the library, most notably memory BIOs.
+
+BUF_MEM_new() allocates a new buffer of zero size.
+
+BUF_MEM_new_ex() allocates a buffer with the specified flags.
+The flag B<BUF_MEM_FLAG_SECURE> specifies that the B<data> pointer
+should be allocated on the secure heap; see L<CRYPTO_secure_malloc(3)>.
+
+BUF_MEM_free() frees up an already existing buffer. The data is zeroed
+before freeing up in case the buffer contains sensitive data.
+
+BUF_MEM_grow() changes the size of an already existing buffer to
+B<len>. Any data already in the buffer is preserved if it increases in
+size.
+
+BUF_MEM_grow_clean() is similar to BUF_MEM_grow() but it sets any free'd
+or additionally-allocated memory to zero.
+
+BUF_reverse() reverses B<size> bytes at B<in> into B<out>.  If B<in>
+is NULL, the array is reversed in-place.
+
+=head1 RETURN VALUES
+
+BUF_MEM_new() returns the buffer or NULL on error.
+
+BUF_MEM_free() has no return value.
+
+BUF_MEM_grow() and BUF_MEM_grow_clean() return
+zero on error or the new size (i.e., B<len>).
+
+=head1 SEE ALSO
+
+L<bio(7)>,
+L<CRYPTO_secure_malloc(3)>.
+
+=head1 HISTORY
+
+BUF_MEM_new_ex() was added in OpenSSL 1.1.0.
+
+=head1 COPYRIGHT
+
+Copyright 2000-2018 The OpenSSL Project Authors. All Rights Reserved.
+
+Licensed under the OpenSSL license (the "License").  You may not use
+this file except in compliance with the License.  You can obtain a copy
+in the file LICENSE in the source distribution or at
+L<https://www.openssl.org/source/license.html>.
+
+=cut