diff --git a/runtime/doc/pi_spec.txt b/runtime/doc/pi_spec.txt
index 27d60b8..a8d26cd 100644
--- a/runtime/doc/pi_spec.txt
+++ b/runtime/doc/pi_spec.txt
@@ -1,4 +1,4 @@
-*pi_spec.txt*   For Vim version 9.0.  Last change: 2006 Apr 24
+*pi_spec.txt*   For Vim version 9.1.  Last change: 2006 Apr 24
 
 by Gustavo Niemeyer ~