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-rw-r--r--src/mame/drivers/tehkanwc.cpp3
1 files changed, 2 insertions, 1 deletions
diff --git a/src/mame/drivers/tehkanwc.cpp b/src/mame/drivers/tehkanwc.cpp
index f800dfcf999..4f88a38b07b 100644
--- a/src/mame/drivers/tehkanwc.cpp
+++ b/src/mame/drivers/tehkanwc.cpp
@@ -715,7 +715,8 @@ MACHINE_CONFIG_START(tehkanwc_state::tehkanwc)
MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.45)
MACHINE_CONFIG_END
-MACHINE_CONFIG_DERIVED(tehkanwc_state::tehkanwcb, tehkanwc)
+MACHINE_CONFIG_START(tehkanwc_state::tehkanwcb)
+ tehkanwc(config);
MCFG_SOUND_REPLACE("ay1", AY8910, 18432000/12)
MCFG_AY8910_PORT_A_WRITE_CB(WRITE8(tehkanwc_state, portA_w))
MCFG_AY8910_PORT_B_WRITE_CB(WRITE8(tehkanwc_state, portB_w))