diff --git a/libs/ardour/triggerbox.cc b/libs/ardour/triggerbox.cc
index 51fcdddd1b..049064ccb8 100644
--- a/libs/ardour/triggerbox.cc
+++ b/libs/ardour/triggerbox.cc
@@ -1720,6 +1720,8 @@ TriggerBox::get_state (void)
 int
 TriggerBox::set_state (const XMLNode& node, int version)
 {
+	Processor::set_state (node, version);
+
 	node.get_property (X_("data-type"), _data_type);
 	node.get_property (X_("order"), _order);