diff --git a/chapter06/zlib.xml b/chapter06/zlib.xml
index ddddad00b..9d4fccd81 100644
--- a/chapter06/zlib.xml
+++ b/chapter06/zlib.xml
@@ -71,6 +71,10 @@
 
 <screen><userinput remap="install">make install</userinput></screen>
 
+    <para>Finally, fix permissions on the static library:</para>
+
+<screen><userinput remap="install">chmod 0644 /usr/lib/libz.a</userinput></screen>
+
   </sect2>
 
   <sect2 id="contents-zlib" role="content">