diff --git a/rw_core/coreif/device_manager_if.go b/rw_core/coreif/device_manager_if.go
index b4329be..7a9e64d 100644
--- a/rw_core/coreif/device_manager_if.go
+++ b/rw_core/coreif/device_manager_if.go
@@ -38,4 +38,5 @@
 	DeleteLogicalPorts(context.Context, *voltha.Device) error
 	DeleteAllChildDevices(context.Context, *voltha.Device) error
 	RunPostDeviceDelete(context.Context, *voltha.Device) error
+	ChildDeviceLost(context.Context, *voltha.Device) error
 }