diff --git a/autoload/gitgutter/async.vim b/autoload/gitgutter/async.vim
index 4c17786..b718645 100644
--- a/autoload/gitgutter/async.vim
+++ b/autoload/gitgutter/async.vim
@@ -1,7 +1,7 @@
 let s:jobs = {}
 " Async broken on MacVim in GUI mode:
 " https://github.com/macvim-dev/macvim/issues/272
-let s:available = has('nvim') || (has('patch-7-4-1791') && !(has('gui_macvim') && has('gui_running')))
+let s:available = has('nvim') "|| (has('patch-7-4-1791') && !(has('gui_macvim') && has('gui_running')))
 
 function! gitgutter#async#available()
   return s:available