diff --git a/arch/x86/xen/pci.c b/arch/x86/xen/pci.c
index d661c74..62ab389 100644
--- a/arch/x86/xen/pci.c
+++ b/arch/x86/xen/pci.c
@@ -53,7 +53,7 @@ int xen_register_gsi(u32 gsi, int triggering, int polarity)
 	printk(KERN_DEBUG "xen: --> irq=%d\n", irq);
 
 	if (irq > 0)
-		xen_set_io_apic_routing(irq, triggering, polarity);
+		xen_set_io_apic_routing(irq, triggering == ACPI_LEVEL_SENSITIVE, polarity);
 
 	return irq;
 }