diff --git a/runtime/ftplugin/m4.vim b/runtime/ftplugin/m4.vim
index 8f971e8..1754fd0 100644
--- a/runtime/ftplugin/m4.vim
+++ b/runtime/ftplugin/m4.vim
@@ -1,13 +1,14 @@
 " Vim filetype plugin file
 " Language:         m4
 " Maintainer:       Nikolai Weibull <nikolai+work.vim@bitwi.se>
-" Latest Revision:  2005-06-29
+" Latest Revision:  2005-07-04
 
 if exists("b:did_ftplugin")
   finish
 endif
 let b:did_ftplugin = 1
 
-let b:undo_ftplugin = "setl com< cms<"
+let b:undo_ftplugin = "setl com< cms< fo<"
 
 setlocal comments=:#,:dnl commentstring=dnl\ %s
+setlocal formatoptions-=t formatoptions+=croql