diff --git a/include/linux/mc146818rtc.h b/include/linux/mc146818rtc.h
index 2f4e957..49d93ff 100644
--- a/include/linux/mc146818rtc.h
+++ b/include/linux/mc146818rtc.h
@@ -11,11 +11,10 @@
 #ifndef _MC146818RTC_H
 #define _MC146818RTC_H
 
+#ifdef __KERNEL__
 #include <asm/io.h>
 #include <linux/rtc.h>			/* get the user-level API */
 #include <asm/mc146818rtc.h>		/* register access macros */
-
-#ifdef __KERNEL__
 #include <linux/spinlock.h>		/* spinlock_t */
 extern spinlock_t rtc_lock;		/* serialize CMOS RAM access */