diff --git a/sys/dev/ata/ata-all.h b/sys/dev/ata/ata-all.h
index 12433c2ac94..32bf26d5262 100644
--- a/sys/dev/ata/ata-all.h
+++ b/sys/dev/ata/ata-all.h
@@ -204,6 +204,7 @@
 #define ATA_PC98_BANKADDR_RID           9
 #define ATA_IRQ_RID                     0
 #define ATA_DEV(device)                 ((device == ATA_MASTER) ? 0 : 1)
+#define ATA_CFA_MAGIC			0x848A
 #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 0679a37c3f9..11fe96af9cc 100644
--- a/sys/dev/ata/ata-disk.c
+++ b/sys/dev/ata/ata-disk.c
@@ -71,7 +71,8 @@ ad_probe(device_t dev)
 {
     struct ata_device *atadev = device_get_softc(dev);
 
-    if (!(atadev->param.config & ATA_PROTO_ATAPI))
+    if (!(atadev->param.config & ATA_PROTO_ATAPI) ||
+	(atadev->param.config == ATA_CFA_MAGIC))
 	return 0;
     else
 	return ENXIO;