diff --git a/include/linux/libata.h b/include/linux/libata.h
index ba07e84c984..a5b3dc71e81 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -595,6 +595,7 @@ struct ata_device {
 	unsigned int		horkage;	/* List of broken features */
 	unsigned long		flags;		/* ATA_DFLAG_xxx */
 	struct scsi_device	*sdev;		/* attached SCSI device */
+	void			*private_data;
 #ifdef CONFIG_ATA_ACPI
 	acpi_handle		acpi_handle;
 	union acpi_object	*gtf_cache;