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-rw-r--r--src/mame/drivers/mhavoc.cpp6
1 files changed, 4 insertions, 2 deletions
diff --git a/src/mame/drivers/mhavoc.cpp b/src/mame/drivers/mhavoc.cpp
index 1a4ed380bb4..25cd53766e4 100644
--- a/src/mame/drivers/mhavoc.cpp
+++ b/src/mame/drivers/mhavoc.cpp
@@ -580,14 +580,16 @@ MACHINE_CONFIG_START(mhavoc_state::mhavoc)
MACHINE_CONFIG_END
-MACHINE_CONFIG_DERIVED(mhavoc_state::mhavocrv, mhavoc)
+MACHINE_CONFIG_START(mhavoc_state::mhavocrv)
+ mhavoc(config);
MCFG_SOUND_ADD("tms", TMS5220, MHAVOC_CLOCK/2/9)
MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 1.0)
MACHINE_CONFIG_END
-MACHINE_CONFIG_DERIVED(mhavoc_state::alphaone, mhavoc)
+MACHINE_CONFIG_START(mhavoc_state::alphaone)
+ mhavoc(config);
/* basic machine hardware */
MCFG_CPU_MODIFY("alpha")