diff --git a/chapter01/changelog.xml b/chapter01/changelog.xml
index bf96b3c22..4c2a5d711 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>December 11, 2005 [jhuntwork]: Upgrade to tcl-8.4.12</para>
+</listitem>
+
 <listitem><para>December 11, 2005 [jhuntwork]: Upgrade to less-394.</para>
 </listitem>
 
diff --git a/general.ent b/general.ent
index 69e21d032..1367c39be 100644
--- a/general.ent
+++ b/general.ent
@@ -78,7 +78,7 @@
 <!ENTITY sysklogd-version "1.4.1">
 <!ENTITY sysvinit-version "2.86">
 <!ENTITY tar-version "1.15.1">
-<!ENTITY tcl-version "8.4.11">
+<!ENTITY tcl-version "8.4.12">
 <!ENTITY texinfo-version "4.8">
 <!ENTITY udev-version "071">
 <!ENTITY udev-config-file "udev-config-5.rules">