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 781e7b4..3f2f669 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
@@ -306,6 +306,7 @@
                     L0ModificationInstruction.class,
                     L0ModificationInstruction.L0SubType.class,
                     L0ModificationInstruction.ModLambdaInstruction.class,
+                    L0ModificationInstruction.ModOchSignalInstruction.class,
                     L2ModificationInstruction.class,
                     L2ModificationInstruction.L2SubType.class,
                     L2ModificationInstruction.ModEtherInstruction.class,