diff --git a/runtime/doc/os_win32.txt b/runtime/doc/os_win32.txt
index 1156dd5..bbe9940 100644
--- a/runtime/doc/os_win32.txt
+++ b/runtime/doc/os_win32.txt
@@ -1,4 +1,4 @@
-*os_win32.txt*  For Vim version 9.0.  Last change: 2023 Dec 04
+*os_win32.txt*  For Vim version 9.1.  Last change: 2023 Dec 04
 
 
 		  VIM REFERENCE MANUAL    by George Reilly