diff --git a/man2/sched_rr_get_interval.2 b/man2/sched_rr_get_interval.2
index 8a08ab6b2..5d3a358d6 100644
--- a/man2/sched_rr_get_interval.2
+++ b/man2/sched_rr_get_interval.2
@@ -92,7 +92,7 @@ The system call is not yet implemented (only on rather old kernels).
 Could not find a process with the ID
 .IR pid .
 .SH CONFORMING TO
-POSIX.1-2001.
+POSIX.1-2001, POSIX.1-2008.
 .SH NOTES
 POSIX systems on which
 .BR sched_rr_get_interval ()