--- linux-2.4.19orig/drivers/acpi/bus.c	Sun Oct  6 21:39:56 2002
+++ linux-2.4.19acpi/drivers/acpi/bus.c	Wed Oct  9 01:00:12 2002
@@ -1883,10 +1883,14 @@
 
 #ifdef CONFIG_X86
         /* Ensure the SCI is set to level-triggered, active-low */
+#ifdef CONFIG_X86_IO_APIC
         if (acpi_ioapic)
          	mp_config_ioapic_for_sci(acpi_fadt.sci_int);
 	else
                 eisa_set_level_irq(acpi_fadt.sci_int);
+#else
+	eisa_set_level_irq(acpi_fadt.sci_int);
+#endif
 #endif
 
 	status = acpi_enable_subsystem(ACPI_FULL_INITIALIZATION);