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-rw-r--r--src/mame/drivers/gng.cpp3
1 files changed, 2 insertions, 1 deletions
diff --git a/src/mame/drivers/gng.cpp b/src/mame/drivers/gng.cpp
index 9b8d156b83c..a91bff687c3 100644
--- a/src/mame/drivers/gng.cpp
+++ b/src/mame/drivers/gng.cpp
@@ -438,7 +438,8 @@ MACHINE_CONFIG_START(gng_state::gng)
MCFG_SOUND_ROUTE(3, "mono", 0.20)
MACHINE_CONFIG_END
-MACHINE_CONFIG_DERIVED(gng_state::diamond, gng)
+MACHINE_CONFIG_START(gng_state::diamond)
+ gng(config);
MCFG_CPU_MODIFY("maincpu")
MCFG_CPU_PROGRAM_MAP(diamond_map)