diff --git a/chapter01/changelog.xml b/chapter01/changelog.xml
index 53a80d51a..764bb64bd 100644
--- a/chapter01/changelog.xml
+++ b/chapter01/changelog.xml
@@ -92,7 +92,6 @@ First a summary, then a detailed log.</para>
 <listitem><para>&gcc-specs-patch;</para></listitem>
 <listitem><para>&glibc-testfix-patch;</para></listitem>
 <listitem><para>&perl-libc-patch;</para></listitem>
-<listitem><para>&zlib-security_fix-patch;</para></listitem>
 </itemizedlist>
 </listitem>
  
diff --git a/chapter06/zlib.xml b/chapter06/zlib.xml
index 140ed3780..4f08df639 100644
--- a/chapter06/zlib.xml
+++ b/chapter06/zlib.xml
@@ -30,8 +30,8 @@ some programs.</para>
 <sect2 role="installation">
 <title>Installation of Zlib</title>
 
-<para>Zlib has a security vulnerability currently being addressed upstream. The
-following patch fixes the problem:</para>
+<para>Zlib has a buffer overflow vulnerability that can lead to a Denial of
+Service attack. The following patch fixes the problem:</para>
 
 <screen><userinput>patch -Np1 -i ../&zlib-security_fix-patch;</userinput></screen>