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-rw-r--r--src/mame/drivers/coolpool.cpp3
1 files changed, 2 insertions, 1 deletions
diff --git a/src/mame/drivers/coolpool.cpp b/src/mame/drivers/coolpool.cpp
index 97eb6079a29..0022c3056ac 100644
--- a/src/mame/drivers/coolpool.cpp
+++ b/src/mame/drivers/coolpool.cpp
@@ -854,7 +854,8 @@ MACHINE_CONFIG_START(coolpool_state::coolpool)
MACHINE_CONFIG_END
-MACHINE_CONFIG_DERIVED(coolpool_state::_9ballsht, coolpool)
+MACHINE_CONFIG_START(coolpool_state::_9ballsht)
+ coolpool(config);
MCFG_CPU_MODIFY("maincpu")
MCFG_CPU_PROGRAM_MAP(nballsht_map)