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Diffstat (limited to 'src/mame/drivers/stlforce.cpp')
-rw-r--r--src/mame/drivers/stlforce.cpp3
1 files changed, 2 insertions, 1 deletions
diff --git a/src/mame/drivers/stlforce.cpp b/src/mame/drivers/stlforce.cpp
index 41911f08a89..81d5c26d02a 100644
--- a/src/mame/drivers/stlforce.cpp
+++ b/src/mame/drivers/stlforce.cpp
@@ -220,7 +220,8 @@ MACHINE_CONFIG_START(stlforce_state::stlforce)
MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 1.0)
MACHINE_CONFIG_END
-MACHINE_CONFIG_DERIVED(stlforce_state::twinbrat, stlforce)
+MACHINE_CONFIG_START(stlforce_state::twinbrat)
+ stlforce(config);
/* basic machine hardware */
MCFG_CPU_MODIFY("maincpu")