diff --git a/core/common/src/main/java/org/onosproject/codec/impl/InstructionCodec.java b/core/common/src/main/java/org/onosproject/codec/impl/InstructionCodec.java
index f4d5008..d7307ad 100644
--- a/core/common/src/main/java/org/onosproject/codec/impl/InstructionCodec.java
+++ b/core/common/src/main/java/org/onosproject/codec/impl/InstructionCodec.java
@@ -50,6 +50,9 @@
     protected static final String TUNNEL_ID = "tunnelId";
     protected static final String TCP_PORT = "tcpPort";
     protected static final String UDP_PORT = "udpPort";
+    protected static final String TRIBUTARY_PORT_NUMBER = "tributaryPortNumber";
+    protected static final String TRIBUTARY_SLOT_LEN = "tributarySlotLength";
+    protected static final String TRIBUTARY_SLOT_BITMAP = "tributarySlotBitmap";
 
     protected static final String MISSING_MEMBER_MESSAGE =
             " member is required in Instruction";