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-rw-r--r--src/mame/drivers/konamim2.cpp3
1 files changed, 2 insertions, 1 deletions
diff --git a/src/mame/drivers/konamim2.cpp b/src/mame/drivers/konamim2.cpp
index 42641f1be4b..eececad4fcb 100644
--- a/src/mame/drivers/konamim2.cpp
+++ b/src/mame/drivers/konamim2.cpp
@@ -1325,7 +1325,8 @@ MACHINE_CONFIG_START(konamim2_state::m2)
MACHINE_CONFIG_END
-MACHINE_CONFIG_DERIVED(konamim2_state::_3do_m2, m2)
+MACHINE_CONFIG_START(konamim2_state::_3do_m2)
+ m2(config);
MCFG_CPU_MODIFY("maincpu")
MCFG_CPU_PROGRAM_MAP(_3do_m2_main_m)