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 f843cc4..6b0db59 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
@@ -53,6 +53,7 @@
 import org.onosproject.net.device.DefaultDeviceDescription;
 import org.onosproject.net.device.DefaultPortDescription;
 import org.onosproject.net.flow.CompletedBatchOperation;
+import org.onosproject.net.flow.FlowRule;
 import org.onosproject.net.flow.DefaultFlowEntry;
 import org.onosproject.net.flow.DefaultFlowRule;
 import org.onosproject.net.flow.DefaultTrafficSelector;
@@ -214,6 +215,7 @@
                     DefaultHostDescription.class,
                     DefaultFlowEntry.class,
                     StoredFlowEntry.class,
+                    FlowRule.Type.class,
                     DefaultFlowRule.class,
                     DefaultFlowEntry.class,
                     FlowEntry.FlowEntryState.class,