diff --git a/core/store/serializers/src/main/java/org/onosproject/store/serializers/KryoNamespaces.java b/core/store/serializers/src/main/java/org/onosproject/store/serializers/KryoNamespaces.java
index 6f96498..e0764eb 100644
--- a/core/store/serializers/src/main/java/org/onosproject/store/serializers/KryoNamespaces.java
+++ b/core/store/serializers/src/main/java/org/onosproject/store/serializers/KryoNamespaces.java
@@ -75,6 +75,7 @@
 import org.onosproject.net.OmsPort;
 import org.onosproject.net.Port;
 import org.onosproject.net.PortNumber;
+import org.onosproject.net.TributarySlot;
 import org.onosproject.net.device.DefaultDeviceDescription;
 import org.onosproject.net.device.DefaultPortDescription;
 import org.onosproject.net.device.DefaultPortStatistics;
@@ -476,6 +477,7 @@
             .register(OduCltPortDescription.class)
             .register(OchPortDescription.class)
             .register(OmsPortDescription.class)
+            .register(TributarySlot.class)
             .register(
                     MplsIntent.class,
                     MplsPathIntent.class,