diff --git a/docs/Introduction.xml b/docs/Introduction.xml
index 5000dfffc..e36c22273 100644
--- a/docs/Introduction.xml
+++ b/docs/Introduction.xml
@@ -44,12 +44,12 @@
       <itemizedlist>
         <listitem>
           <para><ulink url="http://www.netfilter.org">Netfilter</ulink> - the
-          packet filter facility builtinto the 2.4 and later Linux
+          packet filter facility built into the 2.4 and later Linux
           kernels.</para>
         </listitem>
 
         <listitem>
-          <para>ipchains - the packet filter facility builtinto the 2.2 Linux
+          <para>ipchains - the packet filter facility built into the 2.2 Linux
           kernels. Also the name of the utility program used to configure and
           control that facility. Netfilter can be used in ipchains
           compatibility mode.</para>