diff --git a/src/mame/drivers/x68k.cpp b/src/mame/drivers/x68k.cpp
index 66bd1d18a16..df555a22ea7 100644
--- a/src/mame/drivers/x68k.cpp
+++ b/src/mame/drivers/x68k.cpp
@@ -1730,7 +1730,7 @@ MACHINE_CONFIG_START(x68k_state::x68000)
 	MCFG_DEVICE_SLOT_INTERFACE(x68000_exp_cards, nullptr, false)
 	MCFG_X68K_EXPANSION_SLOT_OUT_IRQ2_CB(WRITELINE(*this, x68k_state, x68k_irq2_line))
 	MCFG_X68K_EXPANSION_SLOT_OUT_IRQ4_CB(WRITELINE(*this, x68k_state, x68k_irq4_line))
-	MCFG_X68K_EXPANSION_SLOT_OUT_NMI_CB(INPUTLINE("maincpu", INPUT_LINE_NMI))
+	MCFG_X68K_EXPANSION_SLOT_OUT_NMI_CB(INPUTLINE("maincpu", M68K_IRQ_7))
 
 	/* internal ram */
 	MCFG_RAM_ADD(RAM_TAG)