diff --git a/runtime/doc/os_unix.txt b/runtime/doc/os_unix.txt
index 9908b15..90069a2 100644
--- a/runtime/doc/os_unix.txt
+++ b/runtime/doc/os_unix.txt
@@ -1,4 +1,4 @@
-*os_unix.txt*   For Vim version 9.0.  Last change: 2022 Nov 25
+*os_unix.txt*   For Vim version 9.1.  Last change: 2022 Nov 25
 
 
 		  VIM REFERENCE MANUAL    by Bram Moolenaar