diff --git a/drivers/scsi/ahci.c b/drivers/scsi/ahci.c
index b25373f..740e7d8 100644
--- a/drivers/scsi/ahci.c
+++ b/drivers/scsi/ahci.c
@@ -93,6 +93,7 @@
 
 	/* HOST_CAP bits */
 	HOST_CAP_CLO		= (1 << 24), /* Command List Override support */
+	HOST_CAP_NCQ		= (1 << 30), /* Native Command Queueing */
 	HOST_CAP_64		= (1 << 31), /* PCI DAC (64-bit DMA) support */
 
 	/* registers for each SATA port */