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diff --git a/docs/users_guide/8.8.1-notes.rst b/docs/users_guide/8.8.1-notes.rst
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+++ b/docs/users_guide/8.8.1-notes.rst
@@ -14,6 +14,7 @@ Highlights
The highlights, since the 8.6.1 release, are:
- Many, many bug fixes.
+- A new code layout algorithm for x86.
Full details
@@ -73,6 +74,9 @@ Compiler
- The :ghc-flag:`-fllvm-pass-vectors-in-regs` flag is now deprecated as vector
arguments are now passed in registers by default.
+- The :ghc-flag:`-fblock-layout-cfg` flag enables a new code layout algorithm on x86.
+ This is enabled by default at :ghc-flag:`-O` and :ghc-flag:`-O2`.
+
Runtime system
~~~~~~~~~~~~~~