diff --git a/newlib/libc/include/pthread.h b/newlib/libc/include/pthread.h
index c9d24d6e0..c99ad395d 100644
--- a/newlib/libc/include/pthread.h
+++ b/newlib/libc/include/pthread.h
@@ -87,6 +87,12 @@ int	pthread_mutex_timedlock (pthread_mutex_t *__mutex,
 
 #endif /* _POSIX_TIMEOUTS */
 
+#if __GNU_VISIBLE
+/* The Issue 8 standard adds pthread_mutex_clocklock() */
+int pthread_mutex_clocklock(pthread_mutex_t *__restrict, clockid_t,
+				   const struct timespec *__restrict);
+#endif /* __GNU_VISIBLE */
+
 /* Condition Variable Initialization Attributes, P1003.1c/Draft 10, p. 96 */
  
 int	pthread_condattr_init (pthread_condattr_t *__attr);
@@ -126,6 +132,13 @@ int	pthread_cond_wait (pthread_cond_t *__cond, pthread_mutex_t *__mutex);
 int	pthread_cond_timedwait (pthread_cond_t *__cond,
 				pthread_mutex_t *__mutex,
 				const struct timespec *__abstime);
+
+#if __GNU_VISIBLE
+/* The Issue 8 standard adds pthread_cond_clockwait() */
+int pthread_cond_clockwait(pthread_cond_t *__restrict,
+                   pthread_mutex_t *__restrict, clockid_t,
+				   const struct timespec *__restrict);
+#endif /* __GNU_VISIBLE */
  
 #if defined(_POSIX_THREAD_PRIORITY_SCHEDULING)
 
@@ -423,6 +436,15 @@ int	pthread_rwlock_trywrlock (pthread_rwlock_t *__rwlock);
 int	pthread_rwlock_timedwrlock (pthread_rwlock_t *__rwlock,
 				    const struct timespec *__abstime);
 
+#if __GNU_VISIBLE
+/* The Issue 8 standard adds pthread_rwlock_clockrdlock()
+*  and pthread_rwlock_clockwrlock()*/
+int pthread_rwlock_clockrdlock(pthread_rwlock_t *__restrict, clockid_t,
+				   const struct timespec *__restrict);
+int pthread_rwlock_clockwrlock(pthread_rwlock_t *__restrict, clockid_t,
+				   const struct timespec *__restrict);
+#endif /* __GNU_VISIBLE */
+
 #endif /* defined(_POSIX_READER_WRITER_LOCKS) */