diff --git a/src/mess/drivers/tmc1800.c b/src/mess/drivers/tmc1800.c
index d8735aec1e8..0b9b40200e4 100644
--- a/src/mess/drivers/tmc1800.c
+++ b/src/mess/drivers/tmc1800.c
@@ -916,6 +916,6 @@ DRIVER_INIT_MEMBER(tmc1800_state,tmc1800)
 
 /*    YEAR  NAME        PARENT  COMPAT  MACHINE     INPUT       INIT        COMPANY         FULLNAME        FLAGS */
 COMP( 1977, tmc1800,    0,      0,      tmc1800,    tmc1800, tmc1800_state,    tmc1800,	"Telercas Oy",	"Telmac 1800",  GAME_NOT_WORKING )
-COMP( 1977, osc1000b,   tmc1800,0,      osc1000b,   tmc1800, tmc1800_state,    tmc1800,    "OSCOM Oy",		"OSCOM 1000B",  GAME_NOT_WORKING )
+COMP( 1977, osc1000b,   tmc1800,0,      osc1000b,   tmc1800, driver_device,    0,    "OSCOM Oy",		"OSCOM 1000B",  GAME_NOT_WORKING )
 COMP( 1980, tmc2000,    0,      0,      tmc2000,    tmc2000, driver_device,    0,		    "Telercas Oy",  "Telmac 2000",  GAME_SUPPORTS_SAVE )
 COMP( 1980, nano,		tmc2000,0,		nano,		nano, driver_device,		0,			"OSCOM Oy",		"OSCOM Nano",	GAME_SUPPORTS_SAVE )