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diff --git a/bindings/cpp/include/serd/detail/DynamicWrapper.hpp b/bindings/cpp/include/serd/detail/DynamicWrapper.hpp
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+/*
+  Copyright 2019-2021 David Robillard <d@drobilla.net>
+
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
+
+  THIS SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+
+#ifndef SERD_DETAIL_DYNAMICWRAPPER_HPP
+#define SERD_DETAIL_DYNAMICWRAPPER_HPP
+
+// IWYU pragma: no_include "serd/serd.h"
+
+#include "serd/detail/Wrapper.hpp"
+
+#include <type_traits>
+
+namespace serd {
+namespace detail {
+
+/**
+   Ownership for `DynamicDeleter`.
+
+   @ingroup serdpp_detail
+*/
+enum class Ownership {
+  owned, ///< This pointer owns the data and must delete it
+  view,  ///< This pointer is just a view and must not delete the data
+};
+
+/**
+   Deleter for a C object that can handle dynamic ownership.
+
+   Unlike StaticDeleter, this can be used to handle non-owned references to
+   mutable objects, at the cost of an extra word for tracking the ownership
+   (since constness in the type can't convey this information).
+
+   @ingroup serdpp_detail
+*/
+template<class T, void Free(Mutable<T>*)>
+struct DynamicDeleter {
+  // NOLINTNEXTLINE(google-explicit-constructor, hicpp-explicit-conversions)
+  DynamicDeleter(const Ownership ownership)
+    : _ownership{ownership}
+  {}
+
+  template<class = std::enable_if<!std::is_const<T>::value>>
+  void operator()(Mutable<T>* const ptr)
+  {
+    if (_ownership == Ownership::owned) {
+      Free(ptr);
+    }
+  }
+
+  template<class = std::enable_if<std::is_const<T>::value>>
+  void operator()(const T*)
+  {}
+
+private:
+  Ownership _ownership;
+};
+
+} // namespace detail
+} // namespace serd
+
+#endif // SERD_DETAIL_DYNAMICWRAPPER_HPP