diff --git a/drivers/xen/events.c b/drivers/xen/events.c
index b54285e..721b393 100644
--- a/drivers/xen/events.c
+++ b/drivers/xen/events.c
@@ -730,6 +730,7 @@
 		goto out;
 
 	irq_info[irq] = mk_pirq_info(0, map_irq.pirq, 0, map_irq.index);
+	pirq_to_irq[map_irq.pirq] = irq;
 
 	set_irq_chip_and_handler_name(irq, &xen_pirq_chip,
 			handle_level_irq,