diff --git a/man7/sem_overview.7 b/man7/sem_overview.7
index 7ea57bf82..c72621d6a 100644
--- a/man7/sem_overview.7
+++ b/man7/sem_overview.7
@@ -135,8 +135,6 @@ characters.)
 
 Since Linux 2.6.19, ACLs can be placed on files under this directory,
 to control object permissions on a per-user and per-group basis.
-.SH CONFORMING TO
-POSIX.1-2001.
 .SH NOTES
 System V semaphores
 .RB ( semget (2),