diff --git a/drivers/lisp/src/main/java/org/onosproject/drivers/lisp/extensions/codec/LispNatAddressCodec.java b/drivers/lisp/src/main/java/org/onosproject/drivers/lisp/extensions/codec/LispNatAddressCodec.java
index 4ee2fe1..8fac849 100644
--- a/drivers/lisp/src/main/java/org/onosproject/drivers/lisp/extensions/codec/LispNatAddressCodec.java
+++ b/drivers/lisp/src/main/java/org/onosproject/drivers/lisp/extensions/codec/LispNatAddressCodec.java
@@ -34,12 +34,12 @@
  */
 public final class LispNatAddressCodec extends JsonCodec<LispNatAddress> {
 
-    protected static final String MS_UDP_PORT_NUMBER = "msUdpPortNumber";
-    protected static final String ETR_UDP_PORT_NUMBER = "etrUdpPortNumber";
-    protected static final String GLOBAL_ETR_RLOC_ADDRESS = "globalEtrRlocAddress";
-    protected static final String MS_RLOC_ADDRESS = "msRlocAddress";
-    protected static final String PRIVATE_ETR_RLOC_ADDRESS = "privateEtrRlocAddress";
-    protected static final String RTR_RLOC_ADDRESSES = "rtrRlocAddresses";
+    static final String MS_UDP_PORT_NUMBER = "msUdpPortNumber";
+    static final String ETR_UDP_PORT_NUMBER = "etrUdpPortNumber";
+    static final String GLOBAL_ETR_RLOC_ADDRESS = "globalEtrRlocAddress";
+    static final String MS_RLOC_ADDRESS = "msRlocAddress";
+    static final String PRIVATE_ETR_RLOC_ADDRESS = "privateEtrRlocAddress";
+    static final String RTR_RLOC_ADDRESSES = "rtrRlocAddresses";
 
     private static final String MISSING_MEMBER_MESSAGE =
                                 " member is required in LispListAddress";