diff --git a/src/corelib/CMakeLists.txt b/src/corelib/CMakeLists.txt
index 56daff4f836..59362e02f48 100644
--- a/src/corelib/CMakeLists.txt
+++ b/src/corelib/CMakeLists.txt
@@ -103,6 +103,7 @@ qt_internal_add_module(Core
         global/q20algorithm.h
         global/q20functional.h
         global/q20iterator.h
+        global/q20memory.h
         global/q20type_traits.h
         global/q23functional.h
         global/qxpfunctional.h
diff --git a/src/corelib/global/q20memory.h b/src/corelib/global/q20memory.h
new file mode 100644
index 00000000000..438613db48b
--- /dev/null
+++ b/src/corelib/global/q20memory.h
@@ -0,0 +1,46 @@
+// Copyright (C) 2023 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
+
+#ifndef Q20MEMORY_H
+#define Q20MEMORY_H
+
+#include <QtCore/qxptype_traits.h>
+
+#include <memory>
+
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API. Types and functions defined in this
+// file can reliably be replaced by their std counterparts, once available.
+// You may use these definitions in your own code, but be aware that we
+// will remove them once Qt depends on the C++ version that supports
+// them in namespace std. There will be NO deprecation warning, the
+// definitions will JUST go away.
+//
+// If you can't agree to these terms, don't use these definitions!
+//
+// We mean it.
+//
+
+QT_BEGIN_NAMESPACE
+
+namespace q20 {
+
+#if __cplusplus >= 202002L
+using std::construct_at;
+#else
+template <typename T,
+          typename... Args,
+          typename Enable = std::void_t<decltype(::new (std::declval<void *>()) T(std::declval<Args>()...))> >
+         static void construct_at(T *ptr, Args && ... args)
+{
+    ::new (const_cast<void*>(static_cast<const volatile void*>(ptr))) T(std::forward<Args>(args)...);
+}
+#endif
+} // namespace q20
+
+QT_END_NAMESPACE
+
+#endif /* Q20MEMORY_H */