Minor revision of the text.
diff --git a/Doc/lib/libposix.tex b/Doc/lib/libposix.tex
index 5da3783..593d7ca 100644
--- a/Doc/lib/libposix.tex
+++ b/Doc/lib/libposix.tex
@@ -88,8 +88,8 @@
\note{The \refmodule{os} module provides an alternate
implementation of \code{environ} which updates the environment on
modification. Note also that updating \code{os.environ} will render
-this dictionary obsolete. Use of the \refmodule{os} for this is
-recommended over direct access to the \module{posix} module.}
+this dictionary obsolete. Use of the \refmodule{os} module version of
+this is recommended over direct access to the \module{posix} module.}
\end{datadesc}
Additional contents of this module should only be accessed via the