diff --git a/adapters/simulated_olt/adaptercore/simulated_olt.go b/adapters/simulated_olt/adaptercore/simulated_olt.go
index d29fc1e..dd40b27 100644
--- a/adapters/simulated_olt/adaptercore/simulated_olt.go
+++ b/adapters/simulated_olt/adaptercore/simulated_olt.go
@@ -227,7 +227,7 @@
 	return errors.New("UnImplemented")
 }
 
-func (so *SimulatedOLT) Receive_packet_out(device *voltha.Device, egress_port_no int, msg openflow_13.PacketOut) error {
+func (so *SimulatedOLT) Receive_packet_out(deviceId string, egress_port_no int, msg *openflow_13.OfpPacketOut) error {
 	return errors.New("UnImplemented")
 }