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 b20451e..fb29ed4 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
@@ -18,7 +18,6 @@
 import com.google.common.collect.ImmutableList;
 import com.google.common.collect.ImmutableMap;
 import com.google.common.collect.ImmutableSet;
-
 import org.onlab.packet.ChassisId;
 import org.onlab.packet.Ip4Address;
 import org.onlab.packet.Ip4Prefix;
@@ -284,9 +283,9 @@
                     FlowRuleBatchEntry.FlowRuleOperation.class,
                     IntentId.class,
                     IntentState.class,
-                    Key.class,
-                    Key.LongKey.class,
-                    Key.StringKey.class,
+                    //Key.class, is abstract
+                    Key.of(1L, new DefaultApplicationId(0, "bar")).getClass(), //LongKey.class
+                    Key.of("foo", new DefaultApplicationId(0, "bar")).getClass(), //StringKey.class
                     Intent.class,
                     ConnectivityIntent.class,
                     PathIntent.class,