diff --git a/apps/newoptical/src/main/java/org/onosproject/newoptical/OpticalPathProvisioner.java b/apps/newoptical/src/main/java/org/onosproject/newoptical/OpticalPathProvisioner.java
index 906fe33..f1de6e5 100644
--- a/apps/newoptical/src/main/java/org/onosproject/newoptical/OpticalPathProvisioner.java
+++ b/apps/newoptical/src/main/java/org/onosproject/newoptical/OpticalPathProvisioner.java
@@ -165,6 +165,7 @@
 
     private static final KryoNamespace.Builder CONNECTIVITY_SERIALIZER = KryoNamespace.newBuilder()
             .register(KryoNamespaces.API)
+            .register(PacketLinkRealizedByOptical.class)
             .register(OpticalConnectivityId.class)
             .register(OpticalConnectivity.class);