diff --git a/chapter03/packages.xml b/chapter03/packages.xml
index 4969bf10a..4b0faed15 100644
--- a/chapter03/packages.xml
+++ b/chapter03/packages.xml
@@ -131,7 +131,7 @@
     <varlistentry>
       <term>Flex (&flex-version;) - 672 KB:</term>
       <listitem>
-        <para><ulink url="&sourceforge;lex/"/></para>
+        <para><ulink url="&sourceforge;flex/"/></para>
       </listitem>
     </varlistentry>