diff --git a/libupgrade/hmx_upgrade_nvram.c b/libupgrade/hmx_upgrade_nvram.c
index 815652d..65387bc 100644
--- a/libupgrade/hmx_upgrade_nvram.c
+++ b/libupgrade/hmx_upgrade_nvram.c
@@ -163,6 +163,7 @@
   {NVRAM_FIELD_PAIRED_DISK, "PAIRED_DISK", HMX_NVRAM_PARTITION_RW, 0},
   {NVRAM_FIELD_PARTITION_VER, "PARTITION_VER", HMX_NVRAM_PARTITION_RW, 0},
   {NVRAM_FIELD_MAC_ADDR_WIFI, "MAC_ADDR_WIFI", HMX_NVRAM_PARTITION_RO, 0},
+  {NVRAM_FIELD_MAC_ADDR_WAN, "MAC_ADDR_WAN", HMX_NVRAM_PARTITION_RO, 0},
   {NVRAM_FIELD_DUMMY, "DUMMY", HMX_NVRAM_PARTITION_RW, 0}
 };
 /* End typedef */
diff --git a/libupgrade/hmx_upgrade_nvram.h b/libupgrade/hmx_upgrade_nvram.h
index 5ca86a3..3e638fe 100644
--- a/libupgrade/hmx_upgrade_nvram.h
+++ b/libupgrade/hmx_upgrade_nvram.h
@@ -109,6 +109,7 @@
   NVRAM_FIELD_PARTITION_VER,            // partition version
   NVRAM_FIELD_HW_VER,                   // hardware revision
   NVRAM_FIELD_MAC_ADDR_WIFI,
+  NVRAM_FIELD_MAC_ADDR_WAN,
   NVRAM_FIELD_DUMMY = 0xFFFF
 } NVRAM_FIELD_T;