diff --git a/ebook2cw.1 b/ebook2cw.1
index 56779e7..2e8a12a 100644
--- a/ebook2cw.1
+++ b/ebook2cw.1
@@ -1,4 +1,4 @@
-.TH ebook2cw 1 "APRIL 2021" Linux "User Manuals"
+.TH ebook2cw 1 "AUGUST 2023" Linux "User Manuals"
 .SH NAME
 ebook2cw \- Convert ebooks to Morse code audio files (MP3/OGG)
 .SH SYNOPSIS
@@ -9,6 +9,8 @@ ebook2cw \- Convert ebooks to Morse code audio files (MP3/OGG)
 ebook2cw is a command line program which converts a plain text ebook to Morse
 code audio files. It works on several platforms, including Windows and Linux.
 
+The default for INFILE is stdin.
+
 A number of CW and audio parameters can be changed from their default values, by
 command line switches or a config file (see below). These are (default values in brackets):