diff --git a/mocks/mockCoreProxy.go b/mocks/mockCoreProxy.go
index b5a9d63..24f60c8 100644
--- a/mocks/mockCoreProxy.go
+++ b/mocks/mockCoreProxy.go
@@ -206,3 +206,9 @@
 func (mcp *MockCoreProxy) DevicePMConfigUpdate(ctx context.Context, pmConfigs *voltha.PmConfigs) error {
 	return nil
 }
+
+// PortStateUpdate implements mock PortStateUpdate
+func (mcp *MockCoreProxy) PortStateUpdate(ctx context.Context, deviceID string, pType voltha.Port_PortType, portNo uint32,
+	operStatus voltha.OperStatus_OperStatus) error {
+	return nil
+}