diff --git a/headers/private/drivers/scsi_cmds.h b/headers/private/drivers/scsi_cmds.h
index 1e1a47ccbd..ea4523302c 100644
--- a/headers/private/drivers/scsi_cmds.h
+++ b/headers/private/drivers/scsi_cmds.h
@@ -146,6 +146,7 @@
 #define SCSIS_ASC_WAS_RESET					0x2900
 	// reset by power-on/bus reset/device reset
 #define SCSIS_ASC_PARAMS_CHANGED			0x2a00
+#define SCSIS_ASC_CAPACITY_DATA_HAS_CHANGED	0x2a09
 #define SCSIS_ASC_MEDIUM_FORMAT_CORRUPTED	0x3100
 #define SCSIS_ASC_ROUNDED_PARAM				0x3700	// parameter got rounded
 #define SCSIS_ASC_NO_MEDIUM					0x3a00	// medium not present