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-rw-r--r--src/mame/drivers/ac1.cpp3
1 files changed, 2 insertions, 1 deletions
diff --git a/src/mame/drivers/ac1.cpp b/src/mame/drivers/ac1.cpp
index f77630cfd8f..45ec7f930e7 100644
--- a/src/mame/drivers/ac1.cpp
+++ b/src/mame/drivers/ac1.cpp
@@ -158,7 +158,8 @@ MACHINE_CONFIG_START(ac1_state::ac1)
MCFG_CASSETTE_ADD( "cassette" )
MACHINE_CONFIG_END
-MACHINE_CONFIG_DERIVED(ac1_state::ac1_32, ac1)
+MACHINE_CONFIG_START(ac1_state::ac1_32)
+ ac1(config);
MCFG_CPU_MODIFY("maincpu")
MCFG_CPU_PROGRAM_MAP(ac1_32_mem)