diff --git a/man2/nanosleep.2 b/man2/nanosleep.2
index c4a3939b3..5821a0716 100644
--- a/man2/nanosleep.2
+++ b/man2/nanosleep.2
@@ -129,7 +129,7 @@ field was not in the range 0 to 999999999 or
 .I tv_sec
 was negative.
 .SH CONFORMING TO
-POSIX.1-2001.
+POSIX.1-2001, POSIX.1-2008.
 .SH NOTES
 If the interval specified in
 .I req