diff --git a/core/store/serializers/src/main/java/org/onlab/onos/store/serializers/MastershipTermSerializer.java b/core/store/serializers/src/main/java/org/onlab/onos/store/serializers/MastershipTermSerializer.java
index e4cb999..0ac61a8 100644
--- a/core/store/serializers/src/main/java/org/onlab/onos/store/serializers/MastershipTermSerializer.java
+++ b/core/store/serializers/src/main/java/org/onlab/onos/store/serializers/MastershipTermSerializer.java
@@ -22,7 +22,7 @@
 
     @Override
     public MastershipTerm read(Kryo kryo, Input input, Class<MastershipTerm> type) {
-        final NodeId node = new NodeId(kryo.readObject(input, String.class));
+        final NodeId node = new NodeId(input.readString());
         final int term = input.readInt();
         return MastershipTerm.of(node, term);
     }
diff --git a/core/store/serializers/src/main/java/org/onlab/onos/store/serializers/NodeIdSerializer.java b/core/store/serializers/src/main/java/org/onlab/onos/store/serializers/NodeIdSerializer.java
index 57c9c16..460b63d 100644
--- a/core/store/serializers/src/main/java/org/onlab/onos/store/serializers/NodeIdSerializer.java
+++ b/core/store/serializers/src/main/java/org/onlab/onos/store/serializers/NodeIdSerializer.java
@@ -22,12 +22,12 @@
 
     @Override
     public void write(Kryo kryo, Output output, NodeId object) {
-        kryo.writeObject(output, object.toString());
+        output.writeString(object.toString());
     }
 
     @Override
     public NodeId read(Kryo kryo, Input input, Class<NodeId> type) {
-        final String id = kryo.readObject(input, String.class);
+        final String id = input.readString();
         return new NodeId(id);
     }
 }
diff --git a/core/store/serializers/src/main/java/org/onlab/onos/store/serializers/ProviderIdSerializer.java b/core/store/serializers/src/main/java/org/onlab/onos/store/serializers/ProviderIdSerializer.java
index f546f63..060ac7d 100644
--- a/core/store/serializers/src/main/java/org/onlab/onos/store/serializers/ProviderIdSerializer.java
+++ b/core/store/serializers/src/main/java/org/onlab/onos/store/serializers/ProviderIdSerializer.java
@@ -24,13 +24,15 @@
     public void write(Kryo kryo, Output output, ProviderId object) {
         output.writeString(object.scheme());
         output.writeString(object.id());
+        output.writeBoolean(object.isAncillary());
     }
 
     @Override
     public ProviderId read(Kryo kryo, Input input, Class<ProviderId> type) {
         String scheme = input.readString();
         String id = input.readString();
-        return new ProviderId(scheme, id);
+        boolean isAncillary = input.readBoolean();
+        return new ProviderId(scheme, id, isAncillary);
     }
 
 }