diff --git a/src/mame/drivers/rotaryf.cpp b/src/mame/drivers/rotaryf.cpp
index 362f81b2388..ea45991250d 100644
--- a/src/mame/drivers/rotaryf.cpp
+++ b/src/mame/drivers/rotaryf.cpp
@@ -123,9 +123,6 @@ WRITE8_MEMBER(rotaryf_state::porta_w)
 
 WRITE8_MEMBER(rotaryf_state::portc_w)
 {
-	if (data == 0xff)
-		return;
-
 	machine().bookkeeping().coin_counter_w(0, BIT(data, 1));
 
 	// bit 5 set when game starts, but isn't coin lockout?
@@ -275,7 +272,7 @@ void rotaryf_state::rotaryf(machine_config &config)
 	ppi.out_pa_callback().set(FUNC(rotaryf_state::porta_w));
 	ppi.in_pb_callback().set(FUNC(rotaryf_state::portb_r));
 	ppi.out_pc_callback().set(FUNC(rotaryf_state::portc_w));
-	//ppi.tri_pc_callback().set_constant(0);
+	ppi.tri_pc_callback().set_constant(0);
 
 	/* video hardware */
 	screen_device &screen(SCREEN(config, "screen", SCREEN_TYPE_RASTER));