1 files changed, 5 insertions, 2 deletions
diff --git a/doc/zcat.1 b/doc/zcat.1
index b78342f..84cb6f4 100644
--- a/doc/zcat.1
+++ b/doc/zcat.1
@@ -1,5 +1,5 @@
 .\" DO NOT MODIFY THIS FILE!  It was generated by help2man 1.47.16.
-.TH ZCAT "1" "April 2022" "zutils 1.12-pre2" "User Commands"
+.TH ZCAT "1" "December 2022" "zutils 1.12-rc1" "User Commands"
 .SH NAME
 zcat \- decompress and concatenate files to standard output
 .SH SYNOPSIS
@@ -54,7 +54,7 @@ number all output lines
 don't read runtime configuration file
 .TP
 \fB\-O\fR, \fB\-\-force\-format=\fR<fmt>
-force the format given (bz2, gz, lz, xz, zst)
+force the input format
 .TP
 \fB\-q\fR, \fB\-\-quiet\fR
 suppress all messages
@@ -94,6 +94,9 @@ set compressor and options for xz format
 .TP
 \fB\-\-zst=\fR<command>
 set compressor and options for zstd format
+.PP
+Valid formats for options '\-M' and '\-O' are 'bz2', 'gz', 'lz', 'xz', 'zst',
+and 'un' for uncompressed.
 .SH "REPORTING BUGS"
 Report bugs to zutils\-bug@nongnu.org
 .br