diff --git a/documentation/ref-manual/introduction.xml b/documentation/ref-manual/introduction.xml
index 2f84b28b28..4418b5a3f6 100644
--- a/documentation/ref-manual/introduction.xml
+++ b/documentation/ref-manual/introduction.xml
@@ -161,6 +161,7 @@
                 <listitem><para>CentOS release 5.8 (Final)</para></listitem>
                 <listitem><para>CentOS release 6.3 (Final)</para></listitem> -->
                 <listitem><para>CentOS release 6.x</para></listitem>
+                <listitem><para>CentOS release 7.x</para></listitem>
 <!--                <listitem><para>Debian GNU/Linux 6.0 (Squeeze)</para></listitem> -->
                 <listitem><para>Debian GNU/Linux 7.x (Wheezy)</para></listitem>
 <!--                <listitem><para>Debian GNU/Linux 7.1 (Wheezy)</para></listitem>