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-rw-r--r--src/mame/drivers/poly88.cpp3
1 files changed, 2 insertions, 1 deletions
diff --git a/src/mame/drivers/poly88.cpp b/src/mame/drivers/poly88.cpp
index 10fc9853520..a14f460dc8f 100644
--- a/src/mame/drivers/poly88.cpp
+++ b/src/mame/drivers/poly88.cpp
@@ -231,7 +231,8 @@ MACHINE_CONFIG_START(poly88_state::poly88)
MCFG_SNAPSHOT_ADD("snapshot", poly88_state, poly88, "img", 2)
MACHINE_CONFIG_END
-MACHINE_CONFIG_DERIVED(poly88_state::poly8813, poly88)
+MACHINE_CONFIG_START(poly88_state::poly8813)
+ poly88(config);
MCFG_CPU_MODIFY("maincpu")
MCFG_CPU_PROGRAM_MAP(poly8813_mem)
MCFG_CPU_IO_MAP(poly8813_io)