diff --git a/runtime/ftplugin/sshconfig.vim b/runtime/ftplugin/sshconfig.vim
index 214e492..c9a5cfa 100644
--- a/runtime/ftplugin/sshconfig.vim
+++ b/runtime/ftplugin/sshconfig.vim
@@ -26,7 +26,7 @@
   if exists(':Sman') == 2
     setlocal iskeyword+=-
     setlocal keywordprg=:Sman
-    let b:undo_ftplugin .= '| setlocal keywordprg< iskeyword<'
+    let b:undo_ftplugin .= '| setlocal keywordprg< iskeyword< | sil! delc -buffer Sman'
   endif
 endif