diff --git a/include/time.h b/include/time.h
index 5b3dde5b..6b2a0693 100644
--- a/include/time.h
+++ b/include/time.h
@@ -87,6 +87,8 @@ struct itimerspec
 #define CLOCK_BOOTTIME           7
 #define CLOCK_REALTIME_ALARM     8
 #define CLOCK_BOOTTIME_ALARM     9
+#define CLOCK_SGI_CYCLE         10
+#define CLOCK_TAI               11
 
 #define TIMER_ABSTIME 1