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 d8274ff..1549c30 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
@@ -89,6 +89,7 @@
 import org.onosproject.net.flow.FlowRuleBatchEvent;
 import org.onosproject.net.flow.FlowRuleBatchOperation;
 import org.onosproject.net.flow.FlowRuleBatchRequest;
+import org.onosproject.net.flow.FlowRuleEvent;
 import org.onosproject.net.flow.FlowRuleExtPayLoad;
 import org.onosproject.net.flow.StoredFlowEntry;
 import org.onosproject.net.flow.criteria.Criterion;
@@ -343,6 +344,8 @@
                     FlowRuleBatchEvent.Type.class,
                     FlowRuleBatchRequest.class,
                     FlowRuleBatchOperation.class,
+                    FlowRuleEvent.class,
+                    FlowRuleEvent.Type.class,
                     CompletedBatchOperation.class,
                     FlowRuleBatchEntry.class,
                     FlowRuleBatchEntry.FlowRuleOperation.class,