diff --git a/include/scsi/scsi_host.h b/include/scsi/scsi_host.h
index 1ea5b51d17493ace9cd5cdf828cfd7e7e554a442..ac1b6125e3ae7d2ea87df9380ad457b53f72f8fc 100644
--- a/include/scsi/scsi_host.h
+++ b/include/scsi/scsi_host.h
@@ -676,5 +676,6 @@ extern struct scsi_device *scsi_get_host_dev(struct Scsi_Host *);
 /* legacy interfaces */
 extern struct Scsi_Host *scsi_register(struct scsi_host_template *, int);
 extern void scsi_unregister(struct Scsi_Host *);
+extern int scsi_host_set_state(struct Scsi_Host *, enum scsi_host_state);
 
 #endif /* _SCSI_SCSI_HOST_H */