diff --git a/gtk2_ardour/editor_canvas.cc b/gtk2_ardour/editor_canvas.cc
index 28bbaf2ce2..f6d6b037ea 100644
--- a/gtk2_ardour/editor_canvas.cc
+++ b/gtk2_ardour/editor_canvas.cc
@@ -316,6 +316,10 @@ Editor::track_canvas_size_allocated ()
 
 	if (playhead_cursor) playhead_cursor->set_length (canvas_height);
 
+	for (MarkerSelection::iterator x = selection->markers.begin(); x != selection->markers.end(); ++x) {
+		(*x)->set_line_length (canvas_height);
+	}
+	
 	// EDIT CURSOR XXX set line height for selected markers here
 
 	if (range_marker_drag_rect) {
diff --git a/gtk2_ardour/marker.cc b/gtk2_ardour/marker.cc
index f67b291af2..df62af90ec 100644
--- a/gtk2_ardour/marker.cc
+++ b/gtk2_ardour/marker.cc
@@ -293,6 +293,15 @@ void Marker::reparent(ArdourCanvas::Group & parent)
 	_parent = &parent;
 }
 
+void
+Marker::set_line_length (double len)
+{
+	if (line) {
+		line_points->back().set_y (len);
+		line->property_points() = *line_points;
+	}
+}
+
 void
 Marker::add_line (ArdourCanvas::Group* group, double initial_height)
 {
diff --git a/gtk2_ardour/marker.h b/gtk2_ardour/marker.h
index 733a2dd416..fa252571fb 100644
--- a/gtk2_ardour/marker.h
+++ b/gtk2_ardour/marker.h
@@ -60,6 +60,7 @@ class Marker : public PBD::Destructible
 	void add_line (ArdourCanvas::Group*, double initial_height);
 	void show_line ();
 	void hide_line ();
+	void set_line_length (double);
 
 	void set_position (nframes_t);
 	void set_name (const string&);