diff --git a/src/mame/drivers/segaxbd.cpp b/src/mame/drivers/segaxbd.cpp
index 6249f42547b..109ff855c71 100644
--- a/src/mame/drivers/segaxbd.cpp
+++ b/src/mame/drivers/segaxbd.cpp
@@ -304,6 +304,7 @@ segaxbd_state::segaxbd_state(const machine_config &mconfig, device_type type, co
 			m_palette_entries(0),
 			m_screen(*this, "screen"),
 			m_palette(*this, "palette"),
+			m_io0_porta(*this, "IO0PORTA"),
 			m_adc_ports(*this, {"ADC0", "ADC1", "ADC2", "ADC3", "ADC4", "ADC5", "ADC6", "ADC7"}),
 			m_mux_ports(*this, {"MUX0", "MUX1", "MUX2", "MUX3"})
 {
@@ -736,7 +737,7 @@ void segaxbd_state::generic_iochip0_lamps_w(uint8_t data)
 
 READ8_MEMBER(segaxbd_state::aburner2_motor_r)
 {
-	uint8_t data = ioport("IO0PORTA")->read() & 0xc0;
+	uint8_t data = m_io0_porta->read() & 0xc0;
 
 	// TODO
 	return data | 0x3f;
@@ -761,7 +762,7 @@ WRITE8_MEMBER(segaxbd_state::aburner2_motor_w)
 
 READ8_MEMBER(segaxbd_state::smgp_motor_r)
 {
-	uint8_t data = ioport("IO0PORTA")->read() & 0xc0;
+	uint8_t data = m_io0_porta->read() & 0xc0;
 
 	// TODO
 	return data | 0x0;
diff --git a/src/mame/includes/segaxbd.h b/src/mame/includes/segaxbd.h
index d01b3be2a78..167cc2df7d1 100644
--- a/src/mame/includes/segaxbd.h
+++ b/src/mame/includes/segaxbd.h
@@ -129,6 +129,7 @@ protected:
 	uint8_t       m_palette_hilight[32];      // RGB translations for hilighted pixels
 	required_device<screen_device> m_screen;
 	required_device<palette_device> m_palette;
+	required_ioport m_io0_porta;
 	optional_ioport_array<8> m_adc_ports;
 	optional_ioport_array<4> m_mux_ports;