diff --git a/RFXtoRP_HsrCarrierApt_UpdateSlotAppointment.ftl b/RFXtoRP_HsrCarrierApt_UpdateSlotAppointment.ftl
index 5885216..ba02b47 100644
--- a/RFXtoRP_HsrCarrierApt_UpdateSlotAppointment.ftl
+++ b/RFXtoRP_HsrCarrierApt_UpdateSlotAppointment.ftl
@@ -13,6 +13,7 @@
 				"AppointmentID": "${carrier_apt.physical_depot?json_string}${carrier_apt.year_number}${carrier_apt.appointment_number}",
 			</#if>
 		</#if>
+		"ActorID": "${RFXtoRPprefixDepot(carrier_apt.physical_depot?json_string)}",
 		<#if carrier_apt.unloading_appointment == "true" && carrier_apt.load_appointment == "false">
         	<#if carrier_apt.planned_unloading_start_datetime?starts_with("00") || carrier_apt.planned_unloading_start_datetime?contains("-00-") || carrier_apt.planned_unloading_end_datetime?starts_with("00") || carrier_apt.planned_unloading_end_datetime?contains("-00-")>
 			   <#stop "planned_unloading_start_datetime or planned_unloading_end_datetime field of appointmend is not initialized" >