diff --git a/reference/rrd/functions/rrd_version.xml b/reference/rrd/functions/rrd_version.xml
new file mode 100644
index 0000000000..7cc1e08287
--- /dev/null
+++ b/reference/rrd/functions/rrd_version.xml
@@ -0,0 +1,54 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- $Revision: 309799 $ -->
+
+<refentry xml:id="function.rrd-version" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink">
+ <refnamediv>
+  <refname>rrd_version</refname>
+  <refpurpose>Gets information about underlying rrdtool library</refpurpose>
+ </refnamediv>
+
+ <refsect1 role="description">
+  &reftitle.description;
+  <methodsynopsis>
+   <type>string</type><methodname>rrd_version</methodname>
+   <void />
+  </methodsynopsis>
+  <para>
+   Returns information about underlying rrdtool library.
+  </para>
+ </refsect1>
+
+ <refsect1 role="parameters">
+  &reftitle.parameters;
+  &no.function.parameters;
+ </refsect1>
+
+ <refsect1 role="returnvalues">
+  &reftitle.returnvalues;
+  <para>
+   String with rrdtool version number e.g. "1.4.3".
+  </para>
+ </refsect1>
+
+</refentry>
+
+<!-- Keep this comment at the end of the file
+Local variables:
+mode: sgml
+sgml-omittag:t
+sgml-shorttag:t
+sgml-minimize-attributes:nil
+sgml-always-quote-attributes:t
+sgml-indent-step:1
+sgml-indent-data:t
+indent-tabs-mode:nil
+sgml-parent-document:nil
+sgml-default-dtd-file:"~/.phpdoc/manual.ced"
+sgml-exposed-tags:nil
+sgml-local-catalogs:nil
+sgml-local-ecat-files:nil
+End:
+vim600: syn=xml fen fdm=syntax fdl=2 si
+vim: et tw=78 syn=sgml
+vi: ts=1 sw=1
+-->
diff --git a/reference/rrd/versions.xml b/reference/rrd/versions.xml
index bf3ad8ab18..b35d392e81 100644
--- a/reference/rrd/versions.xml
+++ b/reference/rrd/versions.xml
@@ -18,6 +18,7 @@
  <function name='rrd_restore' from='PECL rrd &gt;= 0.9.0'/>
  <function name='rrd_tune' from='PECL rrd &gt;= 0.9.0'/>
  <function name='rrd_xport' from='PECL rrd &gt;= 0.9.0'/>
+ <function name='rrd_version' from='PECL rrd &gt;= 1.0.0'/>
  <!-- Methods -->
  <function name='rrdgraph::__construct' from='PECL rrd &gt;= 0.9.0'/>
  <function name='rrdgraph::save' from='PECL rrd &gt;= 0.9.0'/>