diff --git a/hw/intc/ioapic.c b/hw/intc/ioapic.c
index d1254f860e..9047b8950a 100644
--- a/hw/intc/ioapic.c
+++ b/hw/intc/ioapic.c
@@ -439,6 +439,11 @@ static void ioapic_class_init(ObjectClass *klass, void *data)
     DeviceClass *dc = DEVICE_CLASS(klass);
 
     k->realize = ioapic_realize;
+    /*
+     * If APIC is in kernel, we need to update the kernel cache after
+     * migration, otherwise first 24 gsi routes will be invalid.
+     */
+    k->post_load = ioapic_update_kvm_routes;
     dc->reset = ioapic_reset_common;
     dc->props = ioapic_properties;
 }