diff --git a/src/mame/drivers/apple2gs.cpp b/src/mame/drivers/apple2gs.cpp
index 8f8cb6509eb..78a9622c1c0 100644
--- a/src/mame/drivers/apple2gs.cpp
+++ b/src/mame/drivers/apple2gs.cpp
@@ -544,6 +544,8 @@ private:
 
 	int m_inh_bank;
 
+	bool m_slot_irq;
+
 	double m_x_calibration, m_y_calibration;
 
 	device_a2bus_card_interface *m_slotdevice[8];
@@ -641,6 +643,7 @@ WRITE_LINE_MEMBER(apple2gs_state::a2bus_irq_w)
 	if (state == ASSERT_LINE)
 	{
 		raise_irq(IRQS_SLOT);
+		m_slot_irq = true;
 	}
 	else
 	{
@@ -1350,6 +1353,8 @@ void apple2gs_state::machine_reset()
 	m_mouse_dx = 0x00;
 	m_mouse_dy = 0x00;
 
+	m_slot_irq = false;
+
 	#if !RUN_ADB_MICRO
 	m_adb_state = ADBSTATE_IDLE;
 	m_adb_kmstatus = 0x00;
@@ -2206,9 +2211,15 @@ READ8_MEMBER(apple2gs_state::c000_r)
 			return adb_read_datareg();
 
 		case 0x27:  // KMSTATUS
-		// hack to let one-second IRQs get through in Nucleus
+			// hack to let one-second IRQs get through in Nucleus
 			if (m_vgcint & VGCINT_SECOND)
 				return 0;
+			// secondary hack for slot IRQs
+			if (m_slot_irq)
+			{
+				m_slot_irq = false;
+				return 0;
+			}
 
 			return adb_read_kmstatus();
 #endif