1 files changed, 1 insertions, 0 deletions

diff --git a/lisp/cus-start.el b/lisp/cus-start.el
index 0275624842a..b63f18cac75 100644
--- a/lisp/cus-start.el
+++ b/lisp/cus-start.el
@@ -240,6 +240,7 @@
              (scroll-margin windows integer)
              (truncate-partial-width-windows display boolean)
              (mode-line-inverse-video modeline boolean)
+             (mode-line-in-non-selected-windows modeline boolean "21.3")
              (line-number-display-limit display
                                         (choice integer
                                                 (const :tag "No limit" nil)))