diff --git a/sys/dev/ata/ata-all.h b/sys/dev/ata/ata-all.h
index 2c5637308a0..8ec93d02b51 100644
--- a/sys/dev/ata/ata-all.h
+++ b/sys/dev/ata/ata-all.h
@@ -294,6 +294,7 @@ struct ata_ahci_cmd_list {
 #define ATA_DEV(device)                 ((device == ATA_MASTER) ? 0 : 1)
 #define ATA_CFA_MAGIC1                  0x844A
 #define ATA_CFA_MAGIC2                  0x848A
+#define ATA_CFA_MAGIC3                  0x8400
 #define ATAPI_MAGIC_LSB                 0x14
 #define ATAPI_MAGIC_MSB                 0xeb
 #define ATAPI_P_READ                    (ATA_S_DRQ | ATA_I_IN)
diff --git a/sys/dev/ata/ata-disk.c b/sys/dev/ata/ata-disk.c
index 147cf0ebd1c..f13de568f16 100644
--- a/sys/dev/ata/ata-disk.c
+++ b/sys/dev/ata/ata-disk.c
@@ -80,7 +80,8 @@ ad_probe(device_t dev)
 
     if (!(atadev->param.config & ATA_PROTO_ATAPI) ||
 	(atadev->param.config == ATA_CFA_MAGIC1) ||
-	(atadev->param.config == ATA_CFA_MAGIC2))
+	(atadev->param.config == ATA_CFA_MAGIC2) ||
+	(atadev->param.config == ATA_CFA_MAGIC3))
 	return 0;
     else
 	return ENXIO;