diff --git a/Doc/lib/libgetpass.tex b/Doc/lib/libgetpass.tex
index 28bfe8f..1d177d3 100644
--- a/Doc/lib/libgetpass.tex
+++ b/Doc/lib/libgetpass.tex
@@ -11,11 +11,15 @@
 The \module{getpass} module provides two functions:
 
 
-\begin{funcdesc}{getpass}{\optional{prompt}}
+\begin{funcdesc}{getpass}{\optional{prompt\optional{, stream}}}
   Prompt the user for a password without echoing.  The user is
   prompted using the string \var{prompt}, which defaults to
-  \code{'Password: '}.
+  \code{'Password: '}. On \UNIX, the prompt is written to the
+  file-like object \var{stream}, which defaults to
+  \code{sys.stdout} (this argument is ignored on Windows).
+
   Availability: Macintosh, \UNIX, Windows.
+  \versionadded[The \var{stream} parameter]{2.5}
 \end{funcdesc}