diff --git a/libs/pbd/pbd/destructible.h b/libs/pbd/pbd/destructible.h
index 8acbed05e2..804f32fedc 100644
--- a/libs/pbd/pbd/destructible.h
+++ b/libs/pbd/pbd/destructible.h
@@ -25,8 +25,7 @@
 namespace PBD {
 
 class LIBPBD_API Destructible {
-  public:
-        Destructible() {}
+public:
 	virtual ~Destructible () { Destroyed(); }
 
 	PBD::Signal0<void> Destroyed;
diff --git a/libs/pbd/pbd/statefuldestructible.h b/libs/pbd/pbd/statefuldestructible.h
index d2cf87db10..274457c88f 100644
--- a/libs/pbd/pbd/statefuldestructible.h
+++ b/libs/pbd/pbd/statefuldestructible.h
@@ -26,7 +26,7 @@
 namespace PBD {
 
 /** Base class for objects with saveable and undoable state with destruction notification */
-class LIBPBD_API StatefulDestructible : public Stateful, public Destructible
+class LIBPBD_API StatefulDestructible : public Stateful, virtual public Destructible
 {
 };