diff --git a/arch/x86/include/asm/hw_irq.h b/arch/x86/include/asm/hw_irq.h
index 4615906d83df5b9b606f2f83f9d2f6a90590a297..fa5d1e768ba3e647bfa13f4d360f693c5953f85b 100644
--- a/arch/x86/include/asm/hw_irq.h
+++ b/arch/x86/include/asm/hw_irq.h
@@ -153,7 +153,11 @@ struct irq_cfg {
 };
 
 extern int assign_irq_vector(int, struct irq_cfg *, const struct cpumask *);
+#ifdef CONFIG_SMP
 extern void send_cleanup_vector(struct irq_cfg *);
+#else
+static inline void send_cleanup_vector(struct irq_cfg *c) { }
+#endif
 
 struct irq_data;
 int __ioapic_set_affinity(struct irq_data *, const struct cpumask *,