diff --git a/src/mame/misc/marywu.cpp b/src/mame/misc/marywu.cpp
index 26d26ce275ed9..38fec43131766 100644
--- a/src/mame/misc/marywu.cpp
+++ b/src/mame/misc/marywu.cpp
@@ -75,7 +75,7 @@ static INPUT_PORTS_START( marywu )
 	PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYPAD) PORT_CODE(KEYCODE_I)
 
 	PORT_START("KEYS2")
-	PORT_BIT(0x80, IP_ACTIVE_HIGH, IPT_COIN1)  PORT_IMPULSE(01) PORT_CODE(KEYCODE_A) // If press or IP_ACTIVE_LOW or press will cause error 30.
+	PORT_BIT(0x80, IP_ACTIVE_HIGH, IPT_COIN1)  PORT_IMPULSE(01) PORT_CODE(KEYCODE_A) // If press or IP_ACTIVE_LOW will cause error 30.
 	PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYPAD) PORT_CODE(KEYCODE_S)
 	PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYPAD) PORT_CODE(KEYCODE_D)
 	PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYPAD) PORT_CODE(KEYCODE_F)