diff --git a/runtime/doc/cmdline.txt b/runtime/doc/cmdline.txt
index 214571f..404e54d 100644
--- a/runtime/doc/cmdline.txt
+++ b/runtime/doc/cmdline.txt
@@ -1,4 +1,4 @@
-*cmdline.txt*   For Vim version 9.1.  Last change: 2024 Apr 27
+*cmdline.txt*   For Vim version 9.1.  Last change: 2024 Aug 15
 
 
 		  VIM REFERENCE MANUAL    by Bram Moolenaar
@@ -379,7 +379,7 @@
 
 :keepp[atterns] {command}			*:keepp* *:keeppatterns*
 		Execute {command}, without adding anything to the search
-		history
+		history or modifying the last substitute pattern.
 
 ==============================================================================
 2. Command-line completion				*cmdline-completion*
diff --git a/runtime/doc/version9.txt b/runtime/doc/version9.txt
index 73e54a1..3729590 100644
--- a/runtime/doc/version9.txt
+++ b/runtime/doc/version9.txt
@@ -1,4 +1,4 @@
-*version9.txt*  For Vim version 9.1.  Last change: 2024 Jul 30
+*version9.txt*  For Vim version 9.1.  Last change: 2024 Aug 15
 
 
 		  VIM REFERENCE MANUAL    by Bram Moolenaar
@@ -41592,6 +41592,7 @@
   mark deprecated attributes from LSP server) |complete-items|
 - the regex engines match correctly case-insensitive multi-byte characters
   (and apply proper case folding)
+- |:keeppatterns| preserves the last substitute pattern when used with |:s|
 
 							*added-9.2*
 Added ~