diff --git a/gtk2_ardour/piano_roll_header.cc b/gtk2_ardour/piano_roll_header.cc
index b3ffe0dbaf..d23b974b26 100644
--- a/gtk2_ardour/piano_roll_header.cc
+++ b/gtk2_ardour/piano_roll_header.cc
@@ -674,9 +674,8 @@ PianoRollHeader::on_button_press_event (GdkEventButton* ev)
 				_adj.set_page_size (127.0);
 				_adj.value_changed ();
 				queue_draw ();
-				return false;
 			}
-			return false;
+			return true;
 		} else if (ev->button == 2 && Keyboard::no_modifiers_active (ev->state)) {
 			SetNoteSelection (note); // EMIT SIGNAL
 			return true;