diff --git a/gtk2_ardour/editor_canvas.cc b/gtk2_ardour/editor_canvas.cc
index a08b0a7ac4..b64f87a5ab 100644
--- a/gtk2_ardour/editor_canvas.cc
+++ b/gtk2_ardour/editor_canvas.cc
@@ -266,7 +266,7 @@ Editor::initialize_canvas ()
 	_canvas_drop_zone->set_outline (false);
 	_canvas_drop_zone->Event.connect (sigc::mem_fun (*this, &Editor::canvas_drop_zone_event));
 
-	_canvas_grid_zone = new ArdourCanvas::Rectangle (hv_scroll_group, ArdourCanvas::Rect (0.0, 0.0, ArdourCanvas::COORD_MAX, 0.0));
+	_canvas_grid_zone = new ArdourCanvas::Rectangle (hv_scroll_group, ArdourCanvas::Rect (0.0, 0.0, ArdourCanvas::COORD_MAX, ArdourCanvas::COORD_MAX));
 	/* this thing is transparent */
 	_canvas_grid_zone->set_fill (false);
 	_canvas_grid_zone->set_outline (false);
@@ -342,8 +342,6 @@ Editor::track_canvas_viewport_size_allocated ()
 
 	_canvas_drop_zone->set_y1 (_canvas_drop_zone->y0() + (_visible_canvas_height - 20.0));
 
-	_canvas_grid_zone->set_y1 (_visible_canvas_height);
-
 	// SHOWTRACKS
 
 	if (height_changed) {