diff --git a/gtk2_ardour/editor_tempodisplay.cc b/gtk2_ardour/editor_tempodisplay.cc
index 4cf3d83958..67d97f1685 100644
--- a/gtk2_ardour/editor_tempodisplay.cc
+++ b/gtk2_ardour/editor_tempodisplay.cc
@@ -427,6 +427,7 @@ Editor::update_tempo_curves (double min_tempo, double max_tempo, samplecnt_t sr)
 		++tmp;
 
 		TempoCurve& curve (tm->curve());
+		curve.the_item().lower_to_bottom ();
 
 		curve.set_max_tempo (max_tempo);
 		curve.set_min_tempo (min_tempo);