diff --git a/runtime/doc/undo.txt b/runtime/doc/undo.txt
index d1433d5..6494073 100644
--- a/runtime/doc/undo.txt
+++ b/runtime/doc/undo.txt
@@ -1,4 +1,4 @@
-*undo.txt*      For Vim version 7.3a.  Last change: 2009 Apr 12
+*undo.txt*      For Vim version 7.3b.  Last change: 2009 Apr 12
 
 
 		  VIM REFERENCE MANUAL    by Bram Moolenaar