diff --git a/runtime/doc/os_win32.txt b/runtime/doc/os_win32.txt
index a428c1f..e13f9dd 100644
--- a/runtime/doc/os_win32.txt
+++ b/runtime/doc/os_win32.txt
@@ -1,4 +1,4 @@
-*os_win32.txt*  For Vim version 7.4a.  Last change: 2012 May 18
+*os_win32.txt*  For Vim version 7.4b.  Last change: 2012 May 18
 
 
 		  VIM REFERENCE MANUAL    by George Reilly