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-rw-r--r--src/mame/drivers/rungun.cpp3
1 files changed, 2 insertions, 1 deletions
diff --git a/src/mame/drivers/rungun.cpp b/src/mame/drivers/rungun.cpp
index 4fa03f6f0eb..0be791f2a65 100644
--- a/src/mame/drivers/rungun.cpp
+++ b/src/mame/drivers/rungun.cpp
@@ -459,7 +459,8 @@ MACHINE_CONFIG_END
// for dual-screen output Run and Gun requires the video de-multiplexer board connected to the Jamma output, this gives you 2 Jamma connectors, one for each screen.
// this means when operated as a single dedicated cabinet the game runs at 60fps, and has smoother animations than when operated as a twin setup where each
// screen only gets an update every other frame.
-MACHINE_CONFIG_DERIVED(rungun_state::rng_dual, rng)
+MACHINE_CONFIG_START(rungun_state::rng_dual)
+ rng(config);
MCFG_SCREEN_MODIFY("screen")
MCFG_SCREEN_UPDATE_DRIVER(rungun_state, screen_update_rng_dual_left)