diff --git a/arch/nios2/kernel/irq.c b/arch/nios2/kernel/irq.c
index f5b74ae69b5b331bc237399b43448b3b66521329..6c833a9d4eab8dc979b84b72d7ce1d15ed0fb9a5 100644
--- a/arch/nios2/kernel/irq.c
+++ b/arch/nios2/kernel/irq.c
@@ -67,7 +67,7 @@ static int irq_map(struct irq_domain *h, unsigned int virq,
 	return 0;
 }
 
-static struct irq_domain_ops irq_ops = {
+static const struct irq_domain_ops irq_ops = {
 	.map	= irq_map,
 	.xlate	= irq_domain_xlate_onecell,
 };