diff --git a/libs/ardour/ardour/region.h b/libs/ardour/ardour/region.h
index 8be4709fbf..3c59bd2202 100644
--- a/libs/ardour/ardour/region.h
+++ b/libs/ardour/ardour/region.h
@@ -396,6 +396,7 @@ class Region
 	virtual int _set_state (const XMLNode&, int version, PBD::PropertyChange& what_changed, bool send_signal);
 
 	void register_properties ();
+	void post_set (const PBD::PropertyChange&);
 
 protected:
 	void use_sources (SourceList const &);
diff --git a/libs/ardour/midi_region.cc b/libs/ardour/midi_region.cc
index 3dd0e1e203..c79c4e4bd2 100644
--- a/libs/ardour/midi_region.cc
+++ b/libs/ardour/midi_region.cc
@@ -153,6 +153,8 @@ MidiRegion::clone () const
 void
 MidiRegion::post_set (const PropertyChange& pc)
 {
+	Region::post_set (pc);
+	
 	if (pc.contains (Properties::length) && !pc.contains (Properties::length_beats)) {
 		update_length_beats ();
 	} else if (pc.contains (Properties::start) && !pc.contains (Properties::start_beats)) {
diff --git a/libs/ardour/playlist.cc b/libs/ardour/playlist.cc
index 2586a49fc4..ce6b6734af 100644
--- a/libs/ardour/playlist.cc
+++ b/libs/ardour/playlist.cc
@@ -1354,6 +1354,7 @@ Playlist::flush_notifications (bool from_undo)
 		 (*r)->set_position ((*r)->position() + distance);
 	 }
 
+	 /* XXX: may not be necessary; Region::post_set should do this, I think */
 	 for (RegionList::iterator r = fixup.begin(); r != fixup.end(); ++r) {
 		 (*r)->recompute_position_from_lock_style ();
 	 }
diff --git a/libs/ardour/region.cc b/libs/ardour/region.cc
index 43a4270501..d337cf6625 100644
--- a/libs/ardour/region.cc
+++ b/libs/ardour/region.cc
@@ -1685,3 +1685,11 @@ Region::is_compound () const
 {
 	return max_source_level() > 0;
 }
+
+void
+Region::post_set (const PropertyChange& pc)
+{
+	if (pc.contains (Properties::position)) {
+		recompute_position_from_lock_style ();
+	}
+}