diff --git a/runtime/doc/diff.txt b/runtime/doc/diff.txt
index 1c93de4..2c1233b 100644
--- a/runtime/doc/diff.txt
+++ b/runtime/doc/diff.txt
@@ -1,4 +1,4 @@
-*diff.txt*      For Vim version 9.0.  Last change: 2022 Oct 01
+*diff.txt*      For Vim version 9.0.  Last change: 2022 Dec 24
 
 
 		  VIM REFERENCE MANUAL    by Bram Moolenaar
@@ -148,6 +148,10 @@
 	'foldmethod'	"manual"
 	'foldcolumn'	0
 
+'foldenable' will most-likely be reset to off.  That is when 'foldmethod' is
+is restored to "manual".  The folds themselves are not cleared but they should
+not show up, resetting 'foldenable' is the best way to do that.
+
 ==============================================================================
 2. Viewing diffs						*view-diffs*