diff --git a/documentation/ref-manual/introduction.xml b/documentation/ref-manual/introduction.xml
index e9309ef926..d65ec2364e 100644
--- a/documentation/ref-manual/introduction.xml
+++ b/documentation/ref-manual/introduction.xml
@@ -154,11 +154,14 @@
                 <listitem><para>Ubuntu 13.10</para></listitem> -->
                 <listitem><para>Ubuntu 14.04 (LTS)</para></listitem>
                 <listitem><para>Ubuntu 14.10</para></listitem>
+                <listitem><para>Ubuntu 15.04</para></listitem>
+                <listitem><para>Ubuntu 15.10</para></listitem>
 <!--                <listitem><para>Fedora 16 (Verne)</para></listitem>
                 <listitem><para>Fedora 17 (Spherical)</para></listitem>
                 <listitem><para>Fedora release 19 (Schrödinger's Cat)</para></listitem>
                 <listitem><para>Fedora release 20 (Heisenbug)</para></listitem> -->
                 <listitem><para>Fedora release 21</para></listitem>
+                <listitem><para>Fedora release 22</para></listitem>
 <!--                <listitem><para>CentOS release 5.6 (Final)</para></listitem>
                 <listitem><para>CentOS release 5.7 (Final)</para></listitem>
                 <listitem><para>CentOS release 5.8 (Final)</para></listitem>