diff --git a/arch/x86/kernel/irqinit_64.c b/arch/x86/kernel/irqinit_64.c
index cb875a63867d..da481a1e3f30 100644
--- a/arch/x86/kernel/irqinit_64.c
+++ b/arch/x86/kernel/irqinit_64.c
@@ -81,7 +81,7 @@ int vector_used_by_percpu_irq(unsigned int vector)
 	return 0;
 }
 
-void __init init_ISA_irqs(void)
+static void __init init_ISA_irqs(void)
 {
 	int i;