diff --git a/src/os_dos.h b/src/os_dos.h
index 9e8cd7c..0edc3e0 100644
--- a/src/os_dos.h
+++ b/src/os_dos.h
@@ -1,4 +1,4 @@
-/* vi:set ts=8 sts=4 sw=4:
+/* vi:set ts=8 sts=4 sw=4 noet:
  *
  * VIM - Vi IMproved	by Bram Moolenaar
  *