diff --git a/man2/mlock.2 b/man2/mlock.2
index 69e379f8a..2822df7cf 100644
--- a/man2/mlock.2
+++ b/man2/mlock.2
@@ -271,6 +271,11 @@ For
 is available since Linux 4.4;
 glibc support was added in version 2.27.
 .SH CONFORMING TO
+.BR mlock (),
+.BR munlock (),
+.BR mlockall (),
+and
+.BR munlockall ():
 POSIX.1-2001, POSIX.1-2008, SVr4.
 .PP
 .BR mlock2 ()