diff --git a/autoload/goyo.vim b/autoload/goyo.vim
index 6667620..0593f78 100644
--- a/autoload/goyo.vim
+++ b/autoload/goyo.vim
@@ -203,7 +203,7 @@ function! s:goyo_on(dim)
   endif
 
   " vim-signify
-  let t:goyo_disabled_signify = exists('b:sy') && b:sy.active
+  let t:goyo_disabled_signify = !empty(getbufvar(bufnr(''), 'sy'))
   if t:goyo_disabled_signify
     SignifyToggle
   endif