diff --git a/gtk2_ardour/pianoroll.cc b/gtk2_ardour/pianoroll.cc
index 8a47f3a640..af87dcb9ca 100644
--- a/gtk2_ardour/pianoroll.cc
+++ b/gtk2_ardour/pianoroll.cc
@@ -2293,6 +2293,9 @@ Pianoroll::set (TriggerReference & tref)
 		if (mr) {
 			set_region (mr);
 		}
+
+	} else {
+		view->set_region (nullptr);
 	}
 }