diff --git a/arch/x86/kernel/io_apic_32.c b/arch/x86/kernel/io_apic_32.c
index 4ca548632c8dfa61e5a8a95be00a8cb9d1f97fca..b5680780fa951edfcf8b4616d7ee0e95bb18ae6f 100644
--- a/arch/x86/kernel/io_apic_32.c
+++ b/arch/x86/kernel/io_apic_32.c
@@ -810,10 +810,7 @@ static int __init find_isa_irq_pin(int irq, int type)
 	for (i = 0; i < mp_irq_entries; i++) {
 		int lbus = mp_irqs[i].mpc_srcbus;
 
-		if ((mp_bus_id_to_type[lbus] == MP_BUS_ISA ||
-		     mp_bus_id_to_type[lbus] == MP_BUS_EISA ||
-		     mp_bus_id_to_type[lbus] == MP_BUS_MCA
-		    ) &&
+		if (test_bit(lbus, mp_bus_not_pci) &&
 		    (mp_irqs[i].mpc_irqtype == type) &&
 		    (mp_irqs[i].mpc_srcbusirq == irq))