diff --git a/mmc.h b/mmc.h
index 7c0cb49..b9869e5 100644
--- a/mmc.h
+++ b/mmc.h
@@ -44,6 +44,7 @@
 #define EXT_CSD_BKOPS_EN		163	/* R/W */
 #define EXT_CSD_RST_N_FUNCTION		162	/* R/W */
 #define EXT_CSD_PARTITIONING_SUPPORT	160	/* RO */
+#define EXT_CSD_PARTITION_SETTING_COMPLETED	155	/* R/W */
 #define EXT_CSD_NATIVE_SECTOR_SIZE	63 /* R */
 #define EXT_CSD_USE_NATIVE_SECTOR	62 /* R/W */
 #define EXT_CSD_DATA_SECTOR_SIZE	61 /* R */