diff --git a/NEWS b/NEWS
index 07b5c628eac..625241d9e1f 100644
--- a/NEWS
+++ b/NEWS
@@ -188,6 +188,8 @@ PHP                                                                        NEWS
   . debug_zval_dump() now indicates whether an array is packed. (Max Semenik)
   . Fix GH-12143 (Optimize round). (SakiTakamachi)
   . Changed return type of long2ip to string from string|false. (Jorg Sowa)
+  . Fix GH-12143 (Extend the maximum precision round can handle by one digit).
+    (SakiTakamachi)
 
 - XML:
   . Added XML_OPTION_PARSE_HUGE parser option. (nielsdos)
diff --git a/UPGRADING b/UPGRADING
index f2db62e1f76..424570a109f 100644
--- a/UPGRADING
+++ b/UPGRADING
@@ -381,6 +381,8 @@ PHP 8.4 UPGRADE NOTES
     certain numbers, so this fix removes "pre-rounding" and changes the way numbers
     are compared, so that the values ​​are correctly rounded as decimal numbers.
   . long2ip() now returns string instead of string|false.
+  . The maximum precision that can be handled by round() has been extended by
+    one digit.
 
 ========================================
 6. New Functions