diff --git a/include/linux/irq.h b/include/linux/irq.h
index 42c9cd5..e8a07e7 100644
--- a/include/linux/irq.h
+++ b/include/linux/irq.h
@@ -164,6 +164,14 @@
 
 #endif // CONFIG_SMP
 
+#ifdef CONFIG_IRQBALANCE
+extern void set_balance_irq_affinity(unsigned int irq, cpumask_t mask);
+#else
+static inline void set_balance_irq_affinity(unsigned int irq, cpumask_t mask)
+{
+}
+#endif
+
 extern int no_irq_affinity;
 extern int noirqdebug_setup(char *str);