diff --git a/doc/lib.rst b/doc/lib.rst
index 0c9a4e6d4d..1d7bf96f96 100644
--- a/doc/lib.rst
+++ b/doc/lib.rst
@@ -528,7 +528,8 @@ UNIX specific
 
 * `posix <posix.html>`_
   Contains a wrapper for the POSIX standard.
-
+* `posix_utils <posix_utils.html>`_
+  Contains helpers for the POSIX standard or specialized for Linux and BSDs.
 
 Regular expressions
 -------------------