diff --git a/runtime/doc/os_dos.txt b/runtime/doc/os_dos.txt
index b950953..d24efdf 100644
--- a/runtime/doc/os_dos.txt
+++ b/runtime/doc/os_dos.txt
@@ -295,4 +295,4 @@
 option.  If it is present, Vim sets the 'shellcmdflag' and 'shellquote' or
 'shellxquote' options will be set as described above.
 
- vim:tw=78:ts=8:ft=help:norl:
+ vim:tw=78:ts=8:noet:ft=help:norl: