diff --git a/man3/ctermid.3 b/man3/ctermid.3
index 8d5f56e42..891159744 100644
--- a/man3/ctermid.3
+++ b/man3/ctermid.3
@@ -71,7 +71,7 @@ T{
 T}	Thread safety	MT-Safe
 .TE
 .SH CONFORMING TO
-Svr4, POSIX.1-2001.
+POSIX.1-2001, POSIX.1-2008, Svr4.
 .SH BUGS
 The path returned may not uniquely identify the controlling
 terminal; it may, for example, be