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-rw-r--r--src/mame/drivers/atetris.cpp3
1 files changed, 2 insertions, 1 deletions
diff --git a/src/mame/drivers/atetris.cpp b/src/mame/drivers/atetris.cpp
index d826a5ca48e..1bdcdf35554 100644
--- a/src/mame/drivers/atetris.cpp
+++ b/src/mame/drivers/atetris.cpp
@@ -405,7 +405,8 @@ MACHINE_CONFIG_START(atetris_state::atetrisb2)
MACHINE_CONFIG_END
-MACHINE_CONFIG_DERIVED(atetris_state::atetrisb3, atetrisb2)
+MACHINE_CONFIG_START(atetris_state::atetrisb3)
+ atetrisb2(config);
MCFG_CPU_REPLACE("maincpu", M6502, MASTER_CLOCK/8)
MCFG_CPU_PROGRAM_MAP(atetrisb3_map)