diff --git a/include/linux/ata.h b/include/linux/ata.h
index 18e401f..272736e 100644
--- a/include/linux/ata.h
+++ b/include/linux/ata.h
@@ -352,7 +352,7 @@
 {
 	if (ata_id_major_version(dev_id) >= 5 && ata_id_is_sata(dev_id))
 		return 0;	/* SATA */
-	if (dev_id[93] & 0x4000)
+	if ((dev_id[93] & 0xE000) == 0x6000)
 		return 0;	/* 80 wire */
 	return 1;
 }