diff --git a/drivers/rtc/rtc-core.h b/drivers/rtc/rtc-core.h
index c989142..30bcd14 100644
--- a/drivers/rtc/rtc-core.h
+++ b/drivers/rtc/rtc-core.h
@@ -15,3 +15,17 @@
 #define rtc_dev_del_device(r)	do{}while(0)
 
 #endif
+
+#ifdef CONFIG_RTC_INTF_SYSFS
+
+extern void __init rtc_sysfs_init(struct class *);
+extern void rtc_sysfs_add_device(struct rtc_device *rtc);
+extern void rtc_sysfs_del_device(struct rtc_device *rtc);
+
+#else
+
+#define rtc_sysfs_init(c)	do{}while(0)
+#define rtc_sysfs_add_device(r)	do{}while(0)
+#define rtc_sysfs_del_device(r)	do{}while(0)
+
+#endif