diff --git a/libs/ardour/ardour/selection.h b/libs/ardour/ardour/selection.h
index 26e2c31ce1..6d022b115a 100644
--- a/libs/ardour/ardour/selection.h
+++ b/libs/ardour/ardour/selection.h
@@ -38,7 +38,7 @@ class Session;
 class Stripable;
 class PresentationInfo;
 
-class CoreSelection : public PBD::Stateful {
+class LIBARDOUR_API CoreSelection : public PBD::Stateful {
   public:
 	CoreSelection (Session& s);
 	~CoreSelection ();