diff --git a/doc/gendiff.1 b/doc/gendiff.1
index 3a56e32..92b8fee 100644
--- a/doc/gendiff.1
+++ b/doc/gendiff.1
@@ -3,7 +3,7 @@
 .SH NAME
 gendiff \- utility to aid in error-free diff file generation
 .SH SYNOPSIS
-\fBgendiff\fR <directory> <diff-extension>
+\fBgendiff\fR [diff-options] <directory> <diff-siffux> [patch-name]
 .SH DESCRIPTION
 \fBgendiff\fR is a rather simple script which aids in generating a
 diff file from a single directory.  It takes a directory name and a
@@ -30,6 +30,10 @@ directory one level above where your source code resides, and then type
 .NF
     $ gendiff somedirectory .fix > mydiff-fix.patch
 .FI
+or simply
+.NF
+    $ gendiff somedirectory .fix > mydiff-fix.patch
+.FI
 .PP
 You should redirect the output to a file (as illustrated) unless you want to
 see the results on stdout.