diff --git a/chapter03/packages.xml b/chapter03/packages.xml
index 316a7a0a9..bd078c108 100644
--- a/chapter03/packages.xml
+++ b/chapter03/packages.xml
@@ -403,7 +403,7 @@ url="http://www.linuxfromscratch.org/lfs/download.html#ftp"/>.</para></note>
 <varlistentry>
 <term>Udev Rules Configuration - 5 KB:</term>
 <listitem>
-<para><ulink url="http://downloads.linuxfromscratch.org/udev-config-5.rules"/></para>
+<para><ulink url="http://downloads.linuxfromscratch.org/&udev-config-file;"/></para>
 </listitem>
 </varlistentry>
 
diff --git a/chapter06/udev.xml b/chapter06/udev.xml
index 77b2490d4..0d2ba3618 100644
--- a/chapter06/udev.xml
+++ b/chapter06/udev.xml
@@ -44,7 +44,7 @@
 <para>Udev's configuration is far from ideal by default, so install
 the configuration files here:</para>
 
-<screen><userinput>cp -v ../udev-config-5.rules /etc/udev/rules.d/25-lfs.rules</userinput></screen>
+<screen><userinput>cp -v ../&udev-config-file; /etc/udev/rules.d/25-lfs.rules</userinput></screen>
 
 <para>Install the documentation that explains how to create Udev rules:</para>
 
diff --git a/general.ent b/general.ent
index 759f21bc3..b67301ed8 100644
--- a/general.ent
+++ b/general.ent
@@ -78,6 +78,7 @@
 <!ENTITY tcl-version "8.4.11">
 <!ENTITY texinfo-version "4.8">
 <!ENTITY udev-version "071">
+<!ENTITY udev-config-file "udev-config-5.rules">
 <!ENTITY util-linux-version "2.12r">
 <!ENTITY vim-version "6.4">
 <!ENTITY zlib-version "1.2.3">