diff --git a/deployed/p3p/plugins/system/p3p/p3p.php b/deployed/p3p/plugins/system/p3p/p3p.php
new file mode 100644
index 00000000..162ae008
--- /dev/null
+++ b/deployed/p3p/plugins/system/p3p/p3p.php
@@ -0,0 +1,43 @@
+<?php
+/**
+ * @package     Joomla.Plugin
+ * @subpackage  System.p3p
+ *
+ * @copyright   Copyright (C) 2005 - 2018 Open Source Matters, Inc. All rights reserved.
+ * @license     GNU General Public License version 2 or later; see LICENSE.txt
+ */
+
+defined('_JEXEC') or die;
+
+/**
+ * Joomla! P3P Header Plugin.
+ *
+ * @since  1.6
+ * @deprecate  4.0  Obsolete
+ */
+class PlgSystemP3p extends JPlugin
+{
+	/**
+	 * After initialise.
+	 *
+	 * @return  void
+	 *
+	 * @since   1.6
+	 * @deprecate  4.0  Obsolete
+	 */
+	public function onAfterInitialise()
+	{
+		// Get the header.
+		$header = $this->params->get('header', 'NOI ADM DEV PSAi COM NAV OUR OTRo STP IND DEM');
+		$header = trim($header);
+
+		// Bail out on empty header (why would anyone do that?!).
+		if (empty($header))
+		{
+			return;
+		}
+
+		// Replace any existing P3P headers in the response.
+		JFactory::getApplication()->setHeader('P3P', 'CP="' . $header . '"', true);
+	}
+}
diff --git a/deployed/p3p/plugins/system/p3p/p3p.xml b/deployed/p3p/plugins/system/p3p/p3p.xml
new file mode 100644
index 00000000..552bb946
--- /dev/null
+++ b/deployed/p3p/plugins/system/p3p/p3p.xml
@@ -0,0 +1,33 @@
+<?xml version="1.0" encoding="utf-8"?>
+<extension version="3.1" type="plugin" group="system" method="upgrade">
+	<name>plg_system_p3p</name>
+	<author>Joomla! Project</author>
+	<creationDate>September 2010</creationDate>
+	<copyright>Copyright (C) 2005 - 2018 Open Source Matters. All rights reserved.</copyright>
+	<license>GNU General Public License version 2 or later; see LICENSE.txt</license>
+	<authorEmail>admin@joomla.org</authorEmail>
+	<authorUrl>www.joomla.org</authorUrl>
+	<version>3.0.0</version>
+	<description>PLG_P3P_XML_DESCRIPTION</description>
+	<files>
+		<filename plugin="p3p">p3p.php</filename>
+	</files>
+	<languages>
+		<language tag="en-GB">en-GB.plg_system_p3p.ini</language>
+		<language tag="en-GB">en-GB.plg_system_p3p.sys.ini</language>
+	</languages>
+	<config>
+		<fields name="params">
+			<fieldset name="basic">
+				<field
+					name="header"
+					type="text"
+					label="PLG_P3P_HEADER_LABEL"
+					description="PLG_P3P_HEADER_DESCRIPTION"
+					default="NOI ADM DEV PSAi COM NAV OUR OTRo STP IND DEM"
+					size="37"
+				/>
+			</fieldset>
+		</fields>
+	</config>
+</extension>