diff --git a/arch/x86/kernel/devicetree.c b/arch/x86/kernel/devicetree.c
index f33bb436b8f4..3d3503351242 100644
--- a/arch/x86/kernel/devicetree.c
+++ b/arch/x86/kernel/devicetree.c
@@ -226,6 +226,7 @@ static int ioapic_xlate(struct irq_domain *domain,
 
 const struct irq_domain_ops ioapic_irq_domain_ops = {
 	.map = mp_irqdomain_map,
+	.unmap = mp_irqdomain_unmap,
 	.xlate = ioapic_xlate,
 };