diff --git a/packages.tex b/packages.tex
index 465799f671f9c4f73196f42516b7368c98b6e642..9926035b300bab5a13fb560c6d7bdc48fc0f12fa 100644
--- a/packages.tex
+++ b/packages.tex
@@ -74,7 +74,7 @@
 % fontes adicionais
 \usepackage{amsmath}		% pacotes matemáticos
 \usepackage{amsfonts}		% fontes matemáticas 
-\usepackage{amssymb}		% símbolos 
+% \usepackage{amssymb}		% símbolos 
 
 % ------------------------------------------------------------------------------
 
diff --git a/ppginf.cls b/ppginf.cls
index 6ba0096a821552b5f60c96a0027d48fddc860b57..5b2fab0cb5233bf341df41f2b6ef01f76e4bc496 100644
--- a/ppginf.cls
+++ b/ppginf.cls
@@ -281,7 +281,7 @@
 \newcommand\appendix@chapter[1]{%
   \refstepcounter{chapter}%
   \orig@chapter*{\@tagappendix\ \@Alph\c@chapter\enskip -- \enskip\MakeUppercase{#1}}%
-  \addcontentsline{toc}{chapter}{\@tagappendix\ \@Alph\c@chapter\enskip -- \enskip\uppercase{#1}}}%
+  \addcontentsline{toc}{chapter}{\texorpdfstring{\@tagappendix\ \@Alph\c@chapter\enskip -- \enskip\uppercase{#1}}{#1}}}%
 \let\orig@chapter\chapter
 \g@addto@macro\appendix{\let\chapter\appendix@chapter}