diff --git a/etc/NEWS b/etc/NEWS
index 328c38c1189..5e37b38b90e 100644
--- a/etc/NEWS
+++ b/etc/NEWS
@@ -2535,8 +2535,11 @@ back in Emacs 23.1.  The affected functions are: 'make-obsolete',
 
 ** The 'values' variable is now obsolete.
 
-** The '&define' keyword in an Edebug specification now disables
-backtracking.
++++
+** The '&define' keyword in an Edebug specification now disables backtracking.
+The implementation was buggy, and multiple &define forms in an &or
+form should be exceedingly rare.  See the Info node 'Backtracking' in
+the Emacs Lisp reference manual for background.
 
 
 * Lisp Changes in Emacs 28.1