diff --git a/Customization.md b/Customization.md
index 695bbb7..6d07188 100644
--- a/Customization.md
+++ b/Customization.md
@@ -76,12 +76,13 @@ Suggested by [mm2703](https://github.com/mm2703) and [axelGschaider](https://git
 
 ```vim
 function! g:goyo_before()
-  " ...
+  let b:quitting = 0
+  autocmd QuitPre <buffer> let b:quitting = 1
 endfunction
 
 function! g:goyo_after()
   " Quit Vim if this is the only remaining buffer
-  if len(filter(range(1, bufnr('$')), 'buflisted(v:val)')) == 1
+  if b:quitting && len(filter(range(1, bufnr('$')), 'buflisted(v:val)')) == 1
     qa
   endif
 endfunction