From 01eac4fdefcbd9a380b8e3d00b7ed96517fad1ab Mon Sep 17 00:00:00 2001
From: Gerd Moellmann <gerd@gnu.org>
Date: Thu, 13 Jul 2000 17:43:58 +0000
Subject: [PATCH] (frame-background-mode): Doc fix.

---
 lisp/faces.el | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/lisp/faces.el b/lisp/faces.el
index 0cec44b94d2..2fbe89ca9fa 100644
--- a/lisp/faces.el
+++ b/lisp/faces.el
@@ -1271,7 +1271,8 @@ If omitted or nil, that stands for the selected frame's display."
   "*The brightness of the background.
 Set this to the symbol `dark' if your background color is dark, `light' if
 your background is light, or nil (default) if you want Emacs to
-examine the brightness for you."
+examine the brightness for you.  Don't set this variable with `setq';
+this won't have the expected effect."
   :group 'faces
   :set #'(lambda (var value)
 	   (set-default var value)
-- 
2.39.2