diff --git a/man3/bindresvport.3 b/man3/bindresvport.3
index 28ee69c68..4bf780a58 100644
--- a/man3/bindresvport.3
+++ b/man3/bindresvport.3
@@ -112,7 +112,7 @@ The
 function uses a static variable that was not protected by a lock
 before glibc 2.17, rendering the function MT-Unsafe.
 .SH CONFORMING TO
-Not in POSIX.1-2001.
+Not in POSIX.1.
 Present on the BSDs, Solaris, and many other systems.
 .SH NOTES
 Unlike some