diff --git a/src/mess/drivers/bullet.c b/src/mess/drivers/bullet.c
index fcb3f78f929..e80a50f90ce 100644
--- a/src/mess/drivers/bullet.c
+++ b/src/mess/drivers/bullet.c
@@ -1320,7 +1320,7 @@ static MACHINE_CONFIG_START( bulletf, bulletf_state )
 	MCFG_SCSIBUS_ADD(SCSIBUS_TAG)
 	MCFG_SCSIDEV_ADD(SCSIBUS_TAG ":harddisk0", SCSIHD, SCSI_ID_0)
 	MCFG_SCSICB_ADD(SCSIBUS_TAG ":host")
-	MCFG_SCSICB_REQ_HANDLER(WRITELINE(bulletf_state, req_w))
+	MCFG_SCSICB_REQ_HANDLER(DEVWRITELINE(DEVICE_SELF_OWNER, bulletf_state, req_w))
 
 	// software lists
 	MCFG_SOFTWARE_LIST_ADD("flop_list", "wmbullet")
diff --git a/src/mess/drivers/rmnimbus.c b/src/mess/drivers/rmnimbus.c
index 7877acae4aa..9b101fd4420 100644
--- a/src/mess/drivers/rmnimbus.c
+++ b/src/mess/drivers/rmnimbus.c
@@ -319,7 +319,7 @@ static MACHINE_CONFIG_START( nimbus, rmnimbus_state )
 	MCFG_SCSICB_CD_HANDLER(DEVWRITELINE(DEVICE_SELF_OWNER, rmnimbus_state, nimbus_scsi_cd_w))
 	MCFG_SCSICB_IO_HANDLER(DEVWRITELINE(DEVICE_SELF_OWNER, rmnimbus_state, nimbus_scsi_io_w))
 	MCFG_SCSICB_MSG_HANDLER(DEVWRITELINE(DEVICE_SELF_OWNER, rmnimbus_state, nimbus_scsi_msg_w))
-	MCFG_SCSICB_REQ_HANDLER(WRITELINE(rmnimbus_state, nimbus_scsi_req_w))
+	MCFG_SCSICB_REQ_HANDLER(DEVWRITELINE(DEVICE_SELF_OWNER, rmnimbus_state, nimbus_scsi_req_w))
 
 	MCFG_RAM_ADD(RAM_TAG)
 	MCFG_RAM_DEFAULT_SIZE("1536K")