diff --git a/cpdfmanual.pdf b/cpdfmanual.pdf
index ffb6ebf..c8ccfb5 100644
Binary files a/cpdfmanual.pdf and b/cpdfmanual.pdf differ
diff --git a/cpdfmanual.tex b/cpdfmanual.tex
index 89ca1b9..c9873ea 100644
--- a/cpdfmanual.tex
+++ b/cpdfmanual.tex
@@ -5594,7 +5594,7 @@ To create a new PDF/UA-1 file, with A4 portrait paper, one page, and the title \
 
 \noindent A title is needed for every PDF/UA document (even a blank one) for it to meet the standard. Note that any modifying \texttt{-create-pdf-pages} or \texttt{-create-pdf-papersize} must appear before \texttt{-create-pdf-ua-1} on the command line.
 
-For \texttt{PDF/UA-2}, use \texttt{-create-pdf-ua-2} instead.
+For \texttt{PDF/UA-2}, use \texttt{-create-pdf-ua-2} instead. To make is valid, you must also draw a top-level Document tag as described below.
 
 \section{Drawing PDF/UA files}