diff --git a/pkg/adapters/iAdapter.go b/pkg/adapters/iAdapter.go
index c0e44be..fc57247 100644
--- a/pkg/adapters/iAdapter.go
+++ b/pkg/adapters/iAdapter.go
@@ -51,4 +51,5 @@
 	Revert_image_update(device *voltha.Device, request *voltha.ImageDownload) (*voltha.ImageDownload, error)
 	Enable_port(deviceId string, port *voltha.Port) error
 	Disable_port(deviceId string, port *voltha.Port) error
+	Child_device_lost(parentDeviceId string, parentPortNo uint32, onuID uint32) error
 }