diff --git a/libc/include/time.h b/libc/include/time.h
index e280e0af1..edcc5bdee 100644
--- a/libc/include/time.h
+++ b/libc/include/time.h
@@ -104,6 +104,8 @@ extern int clock_gettime(int, struct timespec *);
 #define CLOCK_REALTIME_HR          4
 #define CLOCK_MONOTONIC_HR         5
 #define CLOCK_BOOTTIME             7
+#define CLOCK_REALTIME_ALARM       8
+#define CLOCK_BOOTTIME_ALARM       9
 
 extern int  timer_create(int, struct sigevent*, timer_t*);
 extern int  timer_delete(timer_t);