diff --git a/runtime/doc/version9.txt b/runtime/doc/version9.txt
index bcb0b78..e212230 100644
--- a/runtime/doc/version9.txt
+++ b/runtime/doc/version9.txt
@@ -1,4 +1,4 @@
-*version9.txt*  For Vim version 9.1.  Last change: 2025 Jan 02
+*version9.txt*  For Vim version 9.1.  Last change: 2025 Jan 12
 
 
 		  VIM REFERENCE MANUAL    by Bram Moolenaar
@@ -41625,6 +41625,9 @@
   the "matches" key
 - |v:stacktrace| The stack trace of the exception most recently caught and
   not finished
+- include the linematch algorithm for the 'diffopt' setting.  This aligns
+  changes between buffers on similar lines improving the diff highlighting in
+  Vim
 
 							*added-9.2*
 Added ~