diff --git a/runtime/compiler/eruby.vim b/runtime/compiler/eruby.vim
index f30fcc3..44194f5 100644
--- a/runtime/compiler/eruby.vim
+++ b/runtime/compiler/eruby.vim
@@ -38,4 +38,4 @@
 let &cpo = s:cpo_save
 unlet s:cpo_save
 
-" vim: nowrap sw=2 sts=2:
+" vim: nowrap sw=2 sts=2 ts=8: