diff --git a/comprehensive-gpl-guide.tex b/comprehensive-gpl-guide.tex
index b273e51..3ba2658 100644
--- a/comprehensive-gpl-guide.tex
+++ b/comprehensive-gpl-guide.tex
@@ -2,6 +2,7 @@
 %
 % Toplevel file to build the entire book.
 \documentclass[10pt, letterpaper]{book}
+\usepackage{hyperref}
 \usepackage{enumerate}
 \usepackage[dvips]{graphicx}
 \usepackage[verbose, twoside, dvips,
@@ -53,7 +54,15 @@ available at \verb=https://creativecommons.org/licenses/by-sa/4.0/legalcode=.
 Each part of this book is separately this same license, but copyrighted by
 different authors at different times.  Each part therefore also contains its
 own copyright and licensing notice.  The notice above is for the entire work,
-and includes all.
+and includes all copyright and licensing details, except for the appendix.
+The appendix includes copies of the texts of various licenses published by
+FSF, and they are all licensed under the license, ``Everyone is permitted to
+copy and distribute verbatim copies of this license document, but changing it
+is not allowed.''.  However, those who seek to make modified versions of
+those licenses should note the
+\href{https://www.gnu.org/licenses/gpl-faq.html#ModifyGPL}{additional
+  permissions given in the GPL FAQ}.
+
 }
 \end{center}