diff --git a/arch/x86/kernel/apic/io_apic.c b/arch/x86/kernel/apic/io_apic.c
index 95e03701106a..29d0752d9517 100644
--- a/arch/x86/kernel/apic/io_apic.c
+++ b/arch/x86/kernel/apic/io_apic.c
@@ -3568,7 +3568,7 @@ static int dmar_msi_set_affinity(unsigned int irq, const struct cpumask *mask)
 
 #endif /* CONFIG_SMP */
 
-struct irq_chip dmar_msi_type = {
+static struct irq_chip dmar_msi_type = {
 	.name = "DMAR_MSI",
 	.unmask = dmar_msi_unmask,
 	.mask = dmar_msi_mask,