From e53d9e5cdbd043575ffa5990c7f465fbea255b4e Mon Sep 17 00:00:00 2001
From: Jared Finder <jared@finder.org>
Date: Thu, 5 Nov 2020 21:15:08 -0800
Subject: [PATCH] * lisp/faces.el (mode-line-highlight): Use :box only when
 supported.

---
 lisp/faces.el | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lisp/faces.el b/lisp/faces.el
index 728f8b0fe67..7355e1dd0a5 100644
--- a/lisp/faces.el
+++ b/lisp/faces.el
@@ -2578,7 +2578,7 @@ non-nil."
   :group 'basic-faces)
 
 (defface mode-line-highlight
-  '((((class color) (min-colors 88))
+  '((((supports :box t) (class color) (min-colors 88))
      :box (:line-width 2 :color "grey40" :style released-button))
     (t
      :inherit highlight))