diff --git a/NEWS b/NEWS
index 0b66ccd0a91..ece950165ad 100644
--- a/NEWS
+++ b/NEWS
@@ -53,6 +53,9 @@ PHP                                                                        NEWS
 - MBstring:
   . Updated Unicode data tables to Unicode 17.0. (Yuya Hamada)
 
+- Reflection:
+  . ReflectionConstant is no longer final. (sasezaki)
+
 - Standard:
   . Passing strings which are not one byte long to ord() is now deprecated.
     (Girgias)
diff --git a/UPGRADING b/UPGRADING
index fc6000686c4..92288ec9845 100644
--- a/UPGRADING
+++ b/UPGRADING
@@ -862,6 +862,9 @@ PHP 8.5 UPGRADE NOTES
     readline_callback_handler_install() have been changed to true, rather
     than bool.
 
+- Reflection:
+  . ReflectionConstant is no longer final.
+
 ========================================
 10. New Global Constants
 ========================================
diff --git a/ext/reflection/php_reflection.stub.php b/ext/reflection/php_reflection.stub.php
index 7af884953be..be372ac7299 100644
--- a/ext/reflection/php_reflection.stub.php
+++ b/ext/reflection/php_reflection.stub.php
@@ -904,7 +904,7 @@ final class ReflectionFiber
  * @strict-properties
  * @not-serializable
  */
-final class ReflectionConstant implements Reflector
+class ReflectionConstant implements Reflector
 {
     public string $name;
 
diff --git a/ext/reflection/php_reflection_arginfo.h b/ext/reflection/php_reflection_arginfo.h
index 907ada13efa..6465c659c73 100644
--- a/ext/reflection/php_reflection_arginfo.h
+++ b/ext/reflection/php_reflection_arginfo.h
@@ -1,5 +1,5 @@
 /* This is a generated file, edit the .stub.php file instead.
- * Stub hash: 0f6ecac0c6c4fb4af140a1be95f6a50c7532dae9 */
+ * Stub hash: 576229f7a0c4afd2f8902db6ce87daa51256965e */
 
 ZEND_BEGIN_ARG_WITH_TENTATIVE_RETURN_TYPE_INFO_EX(arginfo_class_Reflection_getModifierNames, 0, 1, IS_ARRAY, 0)
 	ZEND_ARG_TYPE_INFO(0, modifiers, IS_LONG, 0)
@@ -1894,7 +1894,7 @@ static zend_class_entry *register_class_ReflectionConstant(zend_class_entry *cla
 	zend_class_entry ce, *class_entry;
 
 	INIT_CLASS_ENTRY(ce, "ReflectionConstant", class_ReflectionConstant_methods);
-	class_entry = zend_register_internal_class_with_flags(&ce, NULL, ZEND_ACC_FINAL|ZEND_ACC_NO_DYNAMIC_PROPERTIES|ZEND_ACC_NOT_SERIALIZABLE);
+	class_entry = zend_register_internal_class_with_flags(&ce, NULL, ZEND_ACC_NO_DYNAMIC_PROPERTIES|ZEND_ACC_NOT_SERIALIZABLE);
 	zend_class_implements(class_entry, 1, class_entry_Reflector);
 
 	zval property_name_default_value;