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-rw-r--r--src/mame/drivers/pong.cpp3
1 files changed, 2 insertions, 1 deletions
diff --git a/src/mame/drivers/pong.cpp b/src/mame/drivers/pong.cpp
index 9b8de923d86..4f182270dfe 100644
--- a/src/mame/drivers/pong.cpp
+++ b/src/mame/drivers/pong.cpp
@@ -463,7 +463,8 @@ MACHINE_CONFIG_START(breakout_state::breakout)
MCFG_SOUND_ROUTE_EX(0, "dac", 1.0, DAC_VREF_POS_INPUT) MCFG_SOUND_ROUTE_EX(0, "dac", -1.0, DAC_VREF_NEG_INPUT)
MACHINE_CONFIG_END
-MACHINE_CONFIG_DERIVED(pong_state::pongf, pong)
+MACHINE_CONFIG_START(pong_state::pongf)
+ pong(config);
/* basic machine hardware */
MCFG_DEVICE_MODIFY("maincpu")