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 0ef7347..7862dfc 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
@@ -108,6 +108,8 @@
 import org.onosproject.net.flow.criteria.Criterion;
 import org.onosproject.net.flow.criteria.EthCriterion;
 import org.onosproject.net.flow.criteria.EthTypeCriterion;
+import org.onosproject.net.flow.criteria.ExtensionCriterion;
+import org.onosproject.net.flow.criteria.ExtensionSelectorType;
 import org.onosproject.net.flow.criteria.IPCriterion;
 import org.onosproject.net.flow.criteria.IPDscpCriterion;
 import org.onosproject.net.flow.criteria.IPEcnCriterion;
@@ -482,6 +484,8 @@
             .register(new DefaultOutboundPacketSerializer(), DefaultOutboundPacket.class)
             .register(new AnnotationsSerializer(), DefaultAnnotations.class)
             .register(new ExtensionInstructionSerializer(), Instructions.ExtensionInstructionWrapper.class)
+            .register(new ExtensionCriterionSerializer(), ExtensionCriterion.class)
+            .register(ExtensionSelectorType.class)
             .register(ExtensionTreatmentType.class)
             .register(Versioned.class)
             .register(MapEvent.class)