diff --git a/NEWS b/NEWS
index fcb849ef98a..a5609377683 100644
--- a/NEWS
+++ b/NEWS
@@ -38,6 +38,8 @@ PHP                                                                        NEWS
   . Fixed bug GH-18033 (NULL-ptr dereference when using register_tick_function
     in destructor). (nielsdos)
   . Fixed bug GH-18026 (Improve "expecting token" error for ampersand). (ilutov)
+  . Added the (void) cast to indicate that not using a value is intentional.
+    (timwolla)
 
 - Curl:
   . Added curl_multi_get_handles(). (timwolla)
diff --git a/UPGRADING b/UPGRADING
index 274f45d8f40..1f58e462e67 100644
--- a/UPGRADING
+++ b/UPGRADING
@@ -106,6 +106,9 @@ PHP 8.5 UPGRADE NOTES
   . Fatal Errors (such as an exceeded maximum execution time) now include a
     backtrace.
     RFC: https://wiki.php.net/rfc/error_backtraces_v2
+  . Added the (void) to indicate that not using a value is intentional. The
+    (void) cast does nothing by itself.
+    RFC: https://wiki.php.net/rfc/marking_return_value_as_important
 
 - Curl:
   . Added support for share handles that are persisted across multiple PHP