diff --git a/libupgrade/hmx_upgrade_nvram.c b/libupgrade/hmx_upgrade_nvram.c
index 6bc6d73..abb62b0 100644
--- a/libupgrade/hmx_upgrade_nvram.c
+++ b/libupgrade/hmx_upgrade_nvram.c
@@ -125,6 +125,7 @@
   {NVRAM_FIELD_MAC_ADDR_BT, "MAC_ADDR_BT", HMX_NVRAM_PARTITION_RO, 0},
   {NVRAM_FIELD_GOOGLE_SSL_PEM, "GOOGLE_SSL_PEM", HMX_NVRAM_PARTITION_RO, 0},
   {NVRAM_FIELD_GOOGLE_SSL_CRT, "GOOGLE_SSL_CRT", HMX_NVRAM_PARTITION_RO, 0},
+  {NVRAM_FIELD_HW_VER, "HW_VER", HMX_NVRAM_PARTITION_RO, 0},
   {NVRAM_FIELD_LOADER_VERSION, "LOADER_VERSION", HMX_NVRAM_PARTITION_RW, 0},
   {NVRAM_FIELD_ACTIVATED_KERNEL_NUM, "ACTIVATED_KERNEL_NUM",
     HMX_NVRAM_PARTITION_RW, 0},
diff --git a/libupgrade/hmx_upgrade_nvram.h b/libupgrade/hmx_upgrade_nvram.h
index b7720f7..dba88a5 100644
--- a/libupgrade/hmx_upgrade_nvram.h
+++ b/libupgrade/hmx_upgrade_nvram.h
@@ -82,6 +82,7 @@
   NVRAM_FIELD_EXTRA_KERNEL_OPT,         // string to append to cmdline
   NVRAM_FIELD_PAIRED_DISK,              // serial number of the disk
   NVRAM_FIELD_PARTITION_VER,            // partition version
+  NVRAM_FIELD_HW_VER,                   // hardware revision
   NVRAM_FIELD_DUMMY = 0xFFFF
 } NVRAM_FIELD_T;