diff --git a/adapters/simulated_onu/adaptercore/simulated_onu.go b/adapters/simulated_onu/adaptercore/simulated_onu.go
index 1bdd4bb..e9fa82e 100644
--- a/adapters/simulated_onu/adaptercore/simulated_onu.go
+++ b/adapters/simulated_onu/adaptercore/simulated_onu.go
@@ -219,7 +219,7 @@
 	return errors.New("UnImplemented")
 }
 
-func (so *SimulatedONU) Receive_packet_out(device *voltha.Device, egress_port_no int, msg openflow_13.PacketOut) error {
+func (so *SimulatedONU) Receive_packet_out(deviceId string, egress_port_no int, msg *openflow_13.OfpPacketOut) error {
 	return errors.New("UnImplemented")
 }