diff --git a/libs/ardour/ardour/triggerbox.h b/libs/ardour/ardour/triggerbox.h
index 1fe9344d79..ab8af96bf2 100644
--- a/libs/ardour/ardour/triggerbox.h
+++ b/libs/ardour/ardour/triggerbox.h
@@ -348,6 +348,8 @@ class LIBARDOUR_API AudioTrigger : public Trigger {
 	samplecnt_t to_pad;
 	samplecnt_t to_drop;
 
+	PBD::RingBuffer<Data*> _deletion_queue;
+
 	void drop_data ();
 	int load_data (boost::shared_ptr<AudioRegion>);
 	void determine_tempo ();
diff --git a/libs/ardour/triggerbox.cc b/libs/ardour/triggerbox.cc
index 9f8e9801ee..91f0637b7d 100644
--- a/libs/ardour/triggerbox.cc
+++ b/libs/ardour/triggerbox.cc
@@ -567,6 +567,7 @@ AudioTrigger::AudioTrigger (uint64_t n, TriggerBox& b)
 	, got_stretcher_padding (false)
 	, to_pad (0)
 	, to_drop (0)
+	, _deletion_queue (4)
 {
 }