diff --git a/runtime/doc/os_unix.txt b/runtime/doc/os_unix.txt
index 2f09e4b7..2320e30 100644
--- a/runtime/doc/os_unix.txt
+++ b/runtime/doc/os_unix.txt
@@ -1,4 +1,4 @@
-*os_unix.txt*   For Vim version 7.4a.  Last change: 2005 Mar 29
+*os_unix.txt*   For Vim version 7.4b.  Last change: 2005 Mar 29
 
 
 		  VIM REFERENCE MANUAL    by Bram Moolenaar