diff --git a/libs/ardour/ardour/triggerbox.h b/libs/ardour/ardour/triggerbox.h
index e51e461663..4830f11f1e 100644
--- a/libs/ardour/ardour/triggerbox.h
+++ b/libs/ardour/ardour/triggerbox.h
@@ -178,7 +178,7 @@ class LIBARDOUR_API Trigger : public PBD::Stateful {
 
 	void set_region (boost::shared_ptr<Region>);
 	void clear_region ();
-	virtual int set_region_threaded (boost::shared_ptr<Region>) = 0;
+	virtual int set_region_in_worker_thread (boost::shared_ptr<Region>) = 0;
 	boost::shared_ptr<Region> region() const { return _region; }
 
 	Temporal::BBT_Offset quantization() const;
@@ -312,7 +312,7 @@ class LIBARDOUR_API AudioTrigger : public Trigger {
 
 	double position_as_fraction() const;
 
-	int set_region_threaded (boost::shared_ptr<Region>);
+	int set_region_in_worker_thread (boost::shared_ptr<Region>);
 	void startup ();
 	void jump_start ();
 	void jump_stop ();
@@ -384,7 +384,7 @@ class LIBARDOUR_API MIDITrigger : public Trigger {
 
 	double position_as_fraction() const;
 
-	int set_region_threaded (boost::shared_ptr<Region>);
+	int set_region_in_worker_thread (boost::shared_ptr<Region>);
 	void startup ();
 	void jump_start ();
 	void jump_stop ();
diff --git a/libs/ardour/triggerbox.cc b/libs/ardour/triggerbox.cc
index 6a76df382f..5c15efbd95 100644
--- a/libs/ardour/triggerbox.cc
+++ b/libs/ardour/triggerbox.cc
@@ -785,7 +785,7 @@ AudioTrigger::natural_length() const
 }
 
 int
-AudioTrigger::set_region_threaded (boost::shared_ptr<Region> r)
+AudioTrigger::set_region_in_worker_thread (boost::shared_ptr<Region> r)
 {
 	assert (!active());
 
@@ -1464,7 +1464,7 @@ MIDITrigger::natural_length() const
 }
 
 int
-MIDITrigger::set_region_threaded (boost::shared_ptr<Region> r)
+MIDITrigger::set_region_in_worker_thread (boost::shared_ptr<Region> r)
 {
 	boost::shared_ptr<MidiRegion> mr = boost::dynamic_pointer_cast<MidiRegion> (r);
 
@@ -1748,7 +1748,7 @@ TriggerBox::set_region (uint32_t slot, boost::shared_ptr<Region> region)
 		break;
 	}
 
-	t->set_region_threaded (region);
+	t->set_region_in_worker_thread (region);
 
 	/* XXX what happens if pending is already set? */