diff --git a/libs/pbd/pbd/abstract_ui.cc b/libs/pbd/pbd/abstract_ui.cc
index c0f580de9f..0c3bfa9dd8 100644
--- a/libs/pbd/pbd/abstract_ui.cc
+++ b/libs/pbd/pbd/abstract_ui.cc
@@ -100,6 +100,7 @@ AbstractUI<RequestObject>::AbstractUI (const string& name)
 template <typename RequestObject>
 AbstractUI<RequestObject>::~AbstractUI ()
 {
+	trackable::notify_callbacks ();
 }
 
 template <typename RequestObject> void