diff --git a/chapter01/changelog.xml b/chapter01/changelog.xml
index 4da819040..16c9049d7 100644
--- a/chapter01/changelog.xml
+++ b/chapter01/changelog.xml
@@ -40,6 +40,11 @@
     <listitem>
       <para>2008-10-19</para>
       <itemizedlist>
+        <listitem>
+          <para>[bdubbs] - Added a note to the Host System Requirements that the
+          Linux host must be a 32-bit system and that the book only supports 
+          a 32-bit build.</para>
+        </listitem>
         <listitem>
           <para>[randy] - Updated the book to use 4.13a as the Texinfo version,
           even though the tarball is exactly the same as the previous 4.13
diff --git a/prologue/hostreqs.xml b/prologue/hostreqs.xml
index 281956c41..d90dd420f 100644
--- a/prologue/hostreqs.xml
+++ b/prologue/hostreqs.xml
@@ -99,6 +99,17 @@
       then you can compile a 2.6 kernel yourself. Instructions for compiling the
       kernel and configuring the boot loader (assuming the host uses GRUB) are
       located in <xref linkend="chapter-bootable"/>.</para>
+
+      <note>
+        <para>This version of the book builds a 32-bit Linux system and
+        requires an existing 32-bit version of of the kernel on the Intel/AMD
+        x86 architecture.  Adding capabilty for x86_64 systems is a major
+        objective of a future version of LFS.  Support for 64-bit systems and
+        additional architectures can be found in the Cross-Compiled Linux From
+        Scratch (CLFS) project at <ulink url="http://cross-lfs.org/view/svn/"/>.
+        </para>
+      </note>
+
     </listitem>
 
     <listitem>