diff --git a/libs/ardour/ardour/source.h b/libs/ardour/ardour/source.h
index 2049c638f6..2682bfd27d 100644
--- a/libs/ardour/ardour/source.h
+++ b/libs/ardour/ardour/source.h
@@ -149,6 +149,7 @@ public:
 	std::string       _ancestor_name;
 	std::string       _captured_for;
 	XrunPositions     _xruns;
+	CueMarkers        _cue_markers;
 
 	mutable Glib::Threads::Mutex _lock;
 	mutable Glib::Threads::Mutex _analysis_lock;