diff --git a/libupgrade/hmx_upgrade_nvram.c b/libupgrade/hmx_upgrade_nvram.c
index ff627c0..6088094 100644
--- a/libupgrade/hmx_upgrade_nvram.c
+++ b/libupgrade/hmx_upgrade_nvram.c
@@ -192,6 +192,7 @@
 	{NVRAM_FIELD_EXTRA_KERNEL_OPT			, "EXTRA_KERNEL_OPT"		, HMX_NVRAM_PARTITION_RW, 0},
 	{NVRAM_FIELD_PLATFORM_NAME			, "PLATFORM_NAME"		, HMX_NVRAM_PARTITION_RW, 0},
 	{NVRAM_FIELD_PAIRED_DISK			, "PAIRED_DISK"		, HMX_NVRAM_PARTITION_RW, 0},
+	{NVRAM_FIELD_PARTITION_VER			, "PARTITION_VER"		, HMX_NVRAM_PARTITION_RW, 0},
 
 	{NVRAM_FIELD_BIN8K				 , "BIN8K"				   , HMX_NVRAM_PARTITION_RW, 0x2000},
 	{NVRAM_FIELD_RAWFS				 , "RAWFS" 			       , HMX_NVRAM_PARTITION_W_RAWFS, RAW_FS_SIZE},
diff --git a/libupgrade/hmx_upgrade_nvram.h b/libupgrade/hmx_upgrade_nvram.h
index 3c331f9..16edae3 100644
--- a/libupgrade/hmx_upgrade_nvram.h
+++ b/libupgrade/hmx_upgrade_nvram.h
@@ -248,6 +248,7 @@
 	NVRAM_FIELD_PLATFORM_NAME,				// Platform name, e.g. "gfhd100"
 	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_RAWFS = 0x1000,
 	NVRAM_FIELD_DUMMY = 0xFFFF