diff --git a/mps/manual/source/mmref-copyright.rst b/mps/manual/source/mmref-copyright.rst
index c4403c16948..f990d68f911 100644
--- a/mps/manual/source/mmref-copyright.rst
+++ b/mps/manual/source/mmref-copyright.rst
@@ -1,26 +1,30 @@
 Copyright
 *********
 
-
-Use subject to copyright restrictions
-=====================================
-
 The copyright in The Memory Management Reference is owned by
 `Ravenbrook Limited`_.
 
 .. _Ravenbrook Limited: https://www.ravenbrook.com/
 
-Permission to copy part or all of The Memory Management Reference for
-personal or classroom use is granted without fee, provided that copies
-are not made or distributed for profit or commercial advantage; that
-the copyright notice, the title of the publication, and its date
-appear; and that notice is given that copying is by permission of
-Ravenbrook Limited. To copy otherwise, to republish, to post on
-servers, or to redistribute to lists requires prior specific
-permission.
+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.
 
-Warranty 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.
 
-The Memory Management Reference is provided "as is" without warranty of any kind, express or implied, including, but not limited to, the implied warranties of merchantability, fitness for a particular purpose, and non-infringement.
+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
+HOLDER 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.