diff --git a/src/mame/drivers/68ksbc.cpp b/src/mame/drivers/68ksbc.cpp
index 40d635d8d35..ab7f60956ba 100644
--- a/src/mame/drivers/68ksbc.cpp
+++ b/src/mame/drivers/68ksbc.cpp
@@ -83,7 +83,7 @@ void c68ksbc_state::c68ksbc(machine_config &config)
 
 /* ROM definition */
 ROM_START( 68ksbc )
-	ROM_REGION(0x1000000, "maincpu", 0)
+	ROM_REGION(0x3000, "maincpu", 0)
 	ROM_LOAD( "t68k.bin", 0x0000, 0x2f78, CRC(20a8d0d0) SHA1(544fd8bd8ed017115388c8b0f7a7a59a32253e43) )
 ROM_END