diff --git a/runtime/doc/vi_diff.txt b/runtime/doc/vi_diff.txt
index 1714833..3bcee47 100644
--- a/runtime/doc/vi_diff.txt
+++ b/runtime/doc/vi_diff.txt
@@ -1,4 +1,4 @@
-*vi_diff.txt*   For Vim version 9.1.  Last change: 2022 Apr 03
+*vi_diff.txt*   For Vim version 9.1.  Last change: 2024 May 15
 
 
 		  VIM REFERENCE MANUAL    by Bram Moolenaar
@@ -49,7 +49,7 @@
 
 autoprint (ap)		boolean	(default on)		*'autoprint'* *'ap'*
 beautify (bf)		boolean	(default off)		*'beautify'* *'bf'*
-flash (fl)		boolean	(default ??)		*'flash'* *'fl'*
+flash (fl)		boolean	(default on)		*'flash'* *'fl'*
 graphic (gr)		boolean	(default off)		*'graphic'* *'gr'*
 hardtabs (ht)		number	(default 8)		*'hardtabs'* *'ht'*
 	number of spaces that a <Tab> moves on the display