diff --git a/src/hotspot/share/oops/oop.hpp b/src/hotspot/share/oops/oop.hpp
index f52baab0de6..8048c8770c2 100644
--- a/src/hotspot/share/oops/oop.hpp
+++ b/src/hotspot/share/oops/oop.hpp
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1997, 2024, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1997, 2025, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -44,11 +44,6 @@
 //
 // no virtual functions allowed
 
-// Forward declarations.
-class OopClosure;
-class PSPromotionManager;
-class ParCompactionManager;
-
 class oopDesc {
   friend class VMStructs;
   friend class JVMCIVMStructs;