diff --git a/src/mame/misc/marywu.cpp b/src/mame/misc/marywu.cpp
index e155735fca72f..1be4240b9acf1 100644
--- a/src/mame/misc/marywu.cpp
+++ b/src/mame/misc/marywu.cpp
@@ -52,14 +52,14 @@ class marywu_state : public driver_device
 	void ay1_port_b_w(uint8_t data);
 	void ay2_port_a_w(uint8_t data);
 	void ay2_port_b_w(uint8_t data);
-	uint8_t keyboard_r();
+    uint8_t keyboard_r();
 	void data_map(address_map &map) ATTR_COLD;
 	void program_map(address_map &map) ATTR_COLD;
 
 	uint8_t m_selected_7seg_module = 0;
 
 	output_finder<32> m_digits;
-	output_finder<30> m_leds;
+	output_finder<31> m_leds;
 	required_ioport_array<4> m_inputs;
 };
 
@@ -127,7 +127,7 @@ void marywu_state::ay2_port_a_w(uint8_t data)
 void marywu_state::ay2_port_b_w(uint8_t data)
 {
 	// we only have 30 LEDs. The last 2 bits in this port are unused.
-	for (uint8_t i = 0; i < 6; i++)
+	for (uint8_t i = 0; i < 7; i++)
 		m_leds[i + 24] = BIT(data, i);
 }