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-rw-r--r--src/mame/drivers/pingpong.cpp3
1 files changed, 2 insertions, 1 deletions
diff --git a/src/mame/drivers/pingpong.cpp b/src/mame/drivers/pingpong.cpp
index 08783357944..16341198293 100644
--- a/src/mame/drivers/pingpong.cpp
+++ b/src/mame/drivers/pingpong.cpp
@@ -476,7 +476,8 @@ MACHINE_CONFIG_START(pingpong_state::pingpong)
MACHINE_CONFIG_END
/* too fast! */
-MACHINE_CONFIG_DERIVED(pingpong_state::merlinmm, pingpong)
+MACHINE_CONFIG_START(pingpong_state::merlinmm)
+ pingpong(config);
MCFG_CPU_MODIFY("maincpu")
MCFG_CPU_PROGRAM_MAP(merlinmm_map)
MCFG_TIMER_MODIFY("scantimer")