diff --git a/UPGRADING b/UPGRADING
index 4a89f3ea0097..7cfe2372ab98 100644
--- a/UPGRADING
+++ b/UPGRADING
@@ -364,6 +364,10 @@ PHP 8.5 UPGRADE NOTES
 14. Performance Improvements
 ========================================
 
+- ReflectionProperty:
+  . Improved performance of the following methods: getValue(), getRawValue(),
+    isInitialized(), setValue(), setRawValue().
+
 - XMLReader:
   . Improved property access performance.