diff --git a/drivers/scsi/libata.h b/drivers/scsi/libata.h
index c2b1c91..4458fd9 100644
--- a/drivers/scsi/libata.h
+++ b/drivers/scsi/libata.h
@@ -39,6 +39,7 @@
 };
 
 /* libata-core.c */
+extern struct workqueue_struct *ata_aux_wq;
 extern int atapi_enabled;
 extern int atapi_dmadir;
 extern int libata_fua;