diff --git a/share/man/man3/intro.3 b/share/man/man3/intro.3
--- a/share/man/man3/intro.3
+++ b/share/man/man3/intro.3
@@ -28,7 +28,7 @@
 .\"     @(#)intro.3	8.1 (Berkeley) 6/5/93
 .\" $FreeBSD$
 .\"
-.Dd December 18, 2021
+.Dd November 7, 2022
 .Dt INTRO 3
 .Os
 .Sh NAME
@@ -231,6 +231,13 @@
 The POSIX threads library.
 See
 .Xr pthread 3 .
+.It Em libstdthreads
+.Pq Fl l Ns Ar stdthreads
+The ISO C11 standard
+.In threads.h
+library.
+See
+.Xr thrd_create 3 .
 .It Em libsysdecode
 .Pq Fl l Ns Ar sysdecode
 The system argument decoding library.