diff --git a/doc/latex/ftpd.tex b/doc/latex/ftpd.tex
index c9864d8..dedb5c6 100644
--- a/doc/latex/ftpd.tex
+++ b/doc/latex/ftpd.tex
@@ -50,6 +50,17 @@ the optional second one.  Here they are:
   names instead of their IP addresses.  If \var{dns-lookup?} is \sharpf,
   the log will only contain IP addresses.  Defaults to \sharpf.
 \end{desc}
+%
+The \ex{make-ftpd-options} eases the construction of the options
+argument:
+%
+\defun{make-ftpd-options}{transformer value \ldots}{options}
+\begin{desc}
+  This constructs an options value from an argument list of parameter
+  transformers and parameter values.  The arguments come in pairs,
+  each an option transformer from the list above, and a value for that
+  parameter.  \ex{Make-ftpd-options} returns the resulting options value.
+\end{desc}
 
 The log format of \ex{ftpd} is the same as the one of
 \ex{wuftpd}.   The entries look like this: