diff --git a/chapter01/changelog.xml b/chapter01/changelog.xml
index b2958bd85..78d24adea 100644
--- a/chapter01/changelog.xml
+++ b/chapter01/changelog.xml
@@ -114,6 +114,9 @@ First a summary, then a detailed log.</para>
 </itemizedlist>
 </listitem>
 
+<listitem><para>January 3, 2006 [matt]: Clarify the description of mktemp's
+--with-libc configure parameter (fixes bug 1667).</para></listitem>
+
 <listitem><para>January 3, 2006 [matt]: Upgrade to libtool 1.5.22.</para>
 </listitem>
 
diff --git a/chapter06/mktemp.xml b/chapter06/mktemp.xml
index ee47463e6..2fd6bfca3 100644
--- a/chapter06/mktemp.xml
+++ b/chapter06/mktemp.xml
@@ -46,7 +46,8 @@ to <command>mktemp</command>. Patch Mktemp to include a
 <term><parameter>--with-libc</parameter></term>
 <listitem><para>This causes the <command>mktemp</command> program to 
 use the <emphasis>mkstemp</emphasis> and <emphasis>mkdtemp</emphasis>
-functions from the system C library.</para></listitem>
+functions from the system C library instead of its own implementation of them.
+</para></listitem>
 </varlistentry>
 </variablelist>