diff --git a/arch/arm/mach-s3c2410/irq.h b/arch/arm/mach-s3c2410/irq.h
index f7cc4c983de53a9c995794d950940fd60bffdb0c..842a9f42c97b9d4b60a08fbfee3dc818667fd801 100644
--- a/arch/arm/mach-s3c2410/irq.h
+++ b/arch/arm/mach-s3c2410/irq.h
@@ -100,5 +100,10 @@ s3c_irqsub_ack(unsigned int irqno, unsigned int parentmask, unsigned int group)
 
 /* exported for use in arch/arm/mach-s3c2410 */
 
+#ifdef CONFIG_PM
 extern int s3c_irq_wake(unsigned int irqno, unsigned int state);
+#else
+#define s3c_irq_wake NULL
+#endif
+
 extern int s3c_irqext_type(unsigned int irq, unsigned int type);