diff --git a/test/hotspot/gtest/gc/shared/test_memset_with_concurrent_readers.cpp b/test/hotspot/gtest/gc/shared/test_memset_with_concurrent_readers.cpp
index 7a3845e336a..875186b83d0 100644
--- a/test/hotspot/gtest/gc/shared/test_memset_with_concurrent_readers.cpp
+++ b/test/hotspot/gtest/gc/shared/test_memset_with_concurrent_readers.cpp
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2016, 2022, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2016, 2023, 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
@@ -26,6 +26,7 @@
 #include "utilities/globalDefinitions.hpp"
 
 #include "utilities/vmassert_uninstall.hpp"
+#include <iomanip>
 #include <string.h>
 #include <sstream>
 #include "utilities/vmassert_reinstall.hpp"