diff --git a/chapter03/patches.xml b/chapter03/patches.xml
index ba9eec067..6b1fb3adc 100644
--- a/chapter03/patches.xml
+++ b/chapter03/patches.xml
@@ -151,12 +151,6 @@ following:</para>
 </listitem>
 </varlistentry>
 
-<varlistentry>
-<term>Zlib Security Patch - 1KB:</term> <listitem>
-<para><ulink url="&patches-root;zlib-&zlib-version;-security-1.patch"/></para>
-</listitem>
-</varlistentry>
-
 </variablelist>
 
 <para>In addition to the above required patches, there exist a number of
diff --git a/chapter06/zlib.xml b/chapter06/zlib.xml
index 43cada8d3..8aa195b62 100644
--- a/chapter06/zlib.xml
+++ b/chapter06/zlib.xml
@@ -28,10 +28,6 @@ some programs.</para>
 <sect2 role="installation">
 <title>Installation of Zlib</title>
 
-<para>Zlib has a known security vulerability.  Patch Zlib to resolve this:</para>
-
-<screen><userinput>patch -Np1 -i ../zlib-&zlib-version;-security-1.patch</userinput></screen>
-
 <note><para>Zlib is known to build its shared library incorrectly if CFLAGS is
 specified in the environment. If you are using your own CFLAGS variable, be
 sure to add the <parameter>-fPIC</parameter> directive to your CFLAGS for the