diff --git a/include/lib/libc/time.h b/include/lib/libc/time.h
index 5a48684..71d3e7e 100644
--- a/include/lib/libc/time.h
+++ b/include/lib/libc/time.h
@@ -8,8 +8,8 @@
  * All rights reserved.
  */
 
-#ifndef _TIME_H
-#define _TIME_H
+#ifndef TIME_H
+#define TIME_H
 
 #include <time_.h>
 
@@ -17,32 +17,4 @@
 #define NULL ((void *) 0)
 #endif
 
-#define CLOCKS_PER_SEC 1000000
-
-typedef long int clock_t;
-
-struct tm {
-	int tm_sec;
-	int tm_min;
-	int tm_hour;
-	int tm_mday;
-	int tm_mon;
-	int tm_year;
-	int tm_wday;
-	int tm_yday;
-	int tm_isdst;
-};
-
-extern clock_t clock(void);
-extern double difftime(time_t time1, time_t time0);
-extern time_t mktime(struct tm *timeptr);
-extern time_t time(time_t *timer);
-extern char *asctime(const struct tm *timeptr);
-extern char *ctime(const time_t *timer);
-extern struct tm *gmtime(const time_t *timer);
-extern struct tm *localtime(const time_t *timer);
-extern size_t strftime(char * restrict s, size_t maxsize,
-                       const char * restrict format,
-                       const struct tm * restrict timeptr);
-
-#endif
+#endif /* TIME_H */