diff --git a/sys/cam/scsi/scsi_low.h b/sys/cam/scsi/scsi_low.h
index 0d8f9964a35..8b31b83b225 100644
--- a/sys/cam/scsi/scsi_low.h
+++ b/sys/cam/scsi/scsi_low.h
@@ -446,7 +446,7 @@ struct scsi_low_softc {
 	/* interface functions */
 	struct scsi_low_funcs *sl_funcs;
 
-#if	defined(i386)
+#if	defined(__i386__)
 	u_int sl_irq;		/* XXX */
 #endif	/* i386 */
 #ifdef __FreeBSD__