diff --git a/README.mkd b/README.mkd
index 1801d39..5e92f23 100644
--- a/README.mkd
+++ b/README.mkd
@@ -5,8 +5,7 @@ A Vim plugin which shows a git diff in the 'gutter' (sign column).  It shows whe
 Features:
 
 * Shows signs for added, modified, and removed lines.
-* Runs the diffs asynchronously in Vim (7.4.1826+) and NeoVim.
-  - MacVim in GUI mode runs synchronously because it doesn't support Vim's async operations yet ([macvim#272](https://github.com/macvim-dev/macvim/issues/272)).
+* Runs the diffs asynchronously in terminal Vim (7.4.1826+) and NeoVim.
 * Ensures signs are always as up to date as possible (but without running more than necessary).
 * Quick jumping between blocks of changed lines ("hunks").
 * Stage/undo/preview individual hunks.
diff --git a/autoload/gitgutter/async.vim b/autoload/gitgutter/async.vim
index 989dc2f..1e4f932 100644
--- a/autoload/gitgutter/async.vim
+++ b/autoload/gitgutter/async.vim
@@ -1,7 +1,5 @@
 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-7-4-1826') && !(has('gui_macvim') && has('gui_running')))
+let s:available = has('nvim') || (has('patch-7-4-1826') && !has('gui_running'))
 
 function! gitgutter#async#available()
   return s:available