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-rw-r--r--src/mame/drivers/x1.cpp3
1 files changed, 2 insertions, 1 deletions
diff --git a/src/mame/drivers/x1.cpp b/src/mame/drivers/x1.cpp
index 2c0c52668cd..cbdf34cafde 100644
--- a/src/mame/drivers/x1.cpp
+++ b/src/mame/drivers/x1.cpp
@@ -2283,7 +2283,8 @@ MACHINE_CONFIG_START(x1_state::x1)
MCFG_TIMER_DRIVER_ADD_PERIODIC("cmt_wind_timer", x1_state, x1_cmt_wind_timer, attotime::from_hz(16))
MACHINE_CONFIG_END
-MACHINE_CONFIG_DERIVED(x1_state::x1turbo, x1)
+MACHINE_CONFIG_START(x1_state::x1turbo)
+ x1(config);
MCFG_CPU_MODIFY("x1_cpu")
MCFG_CPU_PROGRAM_MAP(x1turbo_mem)
MCFG_Z80_DAISY_CHAIN(x1turbo_daisy)