diff --git a/README.REDIST.BINS b/README.REDIST.BINS
index 64123ab004953..4cfb377acfbd3 100644
--- a/README.REDIST.BINS
+++ b/README.REDIST.BINS
@@ -15,6 +15,7 @@
 15. ext/phar/zip.c portion extracted from libzip
 16. libbcmath (ext/bcmath) see ext/bcmath/libbcmath/LICENSE
 17. ext/mbstring/ucgendat portions based on the ucgendat.c from the OpenLDAP
+18. xxHash (ext/hash/xxhash)
 
 
 3. pcre2lib (ext/pcre)
@@ -640,3 +641,39 @@ OpenLDAP is a registered trademark of the OpenLDAP Foundation.
 Copyright 1999-2003 The OpenLDAP Foundation, Redwood City,
 California, USA.  All Rights Reserved.  Permission to copy and
 distribute verbatim copies of this document is granted.
+
+
+18. xxHash
+
+xxHash - Extremely Fast Hash algorithm
+Header File
+Copyright (C) 2012-2020 Yann Collet
+
+BSD 2-Clause License (https://www.opensource.org/licenses/bsd-license.php)
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+
+   * Redistributions of source code must retain the above copyright
+     notice, this list of conditions and the following disclaimer.
+   * 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.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 COPYRIGHT
+OWNER 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) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+You can contact the author at:
+  - xxHash homepage: https://www.xxhash.com
+  - xxHash source repository: https://github.com/Cyan4973/xxHash