diff --git a/drivers/scsi/aic7xxx/aic7xxx_osm.c b/drivers/scsi/aic7xxx/aic7xxx_osm.c
index d3b1082654d5..15e53b33b955 100644
--- a/drivers/scsi/aic7xxx/aic7xxx_osm.c
+++ b/drivers/scsi/aic7xxx/aic7xxx_osm.c
@@ -798,11 +798,18 @@ struct scsi_host_template aic7xxx_driver_template = {
 
 /**************************** Tasklet Handler *********************************/
 
-/******************************** Macros **************************************/
-#define BUILD_SCSIID(ahc, cmd)						    \
-	((((cmd)->device->id << TID_SHIFT) & TID)			    \
-	| (((cmd)->device->channel == 0) ? (ahc)->our_id : (ahc)->our_id_b) \
-	| (((cmd)->device->channel == 0) ? 0 : TWIN_CHNLB))
+
+static inline unsigned int ahc_build_scsiid(struct ahc_softc *ahc,
+					    struct scsi_device *sdev)
+{
+	unsigned int scsiid = (sdev->id << TID_SHIFT) & TID;
+
+	if (sdev->channel == 0)
+		scsiid |= ahc->our_id;
+	else
+		scsiid |= ahc->our_id_b | TWIN_CHNLB;
+	return scsiid;
+}
 
 /******************************** Bus DMA *************************************/
 int
@@ -1457,7 +1464,7 @@ ahc_linux_run_command(struct ahc_softc *ahc, struct ahc_linux_device *dev,
 	 * Fill out basics of the HSCB.
 	 */
 	hscb->control = 0;
-	hscb->scsiid = BUILD_SCSIID(ahc, cmd);
+	hscb->scsiid = ahc_build_scsiid(ahc, cmd->device);
 	hscb->lun = cmd->device->lun;
 	mask = SCB_GET_TARGET_MASK(ahc, scb);
 	tinfo = ahc_fetch_transinfo(ahc, SCB_GET_CHANNEL(ahc, scb),