diff --git a/man2/sched_yield.2 b/man2/sched_yield.2
index 9205156ab..ad689321a 100644
--- a/man2/sched_yield.2
+++ b/man2/sched_yield.2
@@ -50,7 +50,7 @@ In the Linux implementation,
 .BR sched_yield ()
 always succeeds.
 .SH CONFORMING TO
-POSIX.1-2001.
+POSIX.1-2001, POSIX.1-2008.
 .SH NOTES
 If the calling thread is the only thread in the highest
 priority list at that time,