diff --git a/man3/sem_post.3 b/man3/sem_post.3
index 646bf4d86..a011260b3 100644
--- a/man3/sem_post.3
+++ b/man3/sem_post.3
@@ -78,7 +78,9 @@ is async-signal-safe:
 it may be safely called within a signal handler.
 .SH EXAMPLE
 See
-.BR sem_wait (3).
+.BR sem_wait (3)
+and
+.BR shm_open (3).
 .SH SEE ALSO
 .BR sem_getvalue (3),
 .BR sem_wait (3),