diff --git a/ftplugin/markdown.vim b/ftplugin/markdown.vim
index 026e605..164761e 100644
--- a/ftplugin/markdown.vim
+++ b/ftplugin/markdown.vim
@@ -1,5 +1,5 @@
 augroup livedown
-  if g:livedown_autorun
+  if get(g:, 'livedown_autorun', 0)
     au! BufWinEnter <buffer> LivedownPreview
   endif
 
diff --git a/ftplugin/mkd.vim b/ftplugin/mkd.vim
index 026e605..164761e 100644
--- a/ftplugin/mkd.vim
+++ b/ftplugin/mkd.vim
@@ -1,5 +1,5 @@
 augroup livedown
-  if g:livedown_autorun
+  if get(g:, 'livedown_autorun', 0)
     au! BufWinEnter <buffer> LivedownPreview
   endif
 
diff --git a/plugin/livedown.vim b/plugin/livedown.vim
index 64efaa2..0a46319 100644
--- a/plugin/livedown.vim
+++ b/plugin/livedown.vim
@@ -2,10 +2,6 @@ command! LivedownPreview :call s:LivedownPreview()
 command! LivedownKill :call s:LivedownKill()
 command! LivedownToggle :call s:LivedownToggle()
 
-if !exists('g:livedown_autorun')
-  let g:livedown_autorun = 0
-endif
-
 if !exists('g:livedown_open')
   let g:livedown_open = 1
 endif