#ifndef __ardour_comparable_shared_ptr_h__
#define __ardour_comparable_shared_ptr_h__
+#include "ardour/libardour_visibility.h"
+
namespace ARDOUR {
template<typename T>
-class ComparableSharedPtr : public boost::shared_ptr<T>
+class LIBARDOUR_API ComparableSharedPtr : public boost::shared_ptr<T>
, public boost::less_than_comparable<ComparableSharedPtr<T> >
{
public: