diff --git a/phpBB/adm/style/acp_main.html b/phpBB/adm/style/acp_main.html
index 46d65df7a2..7d3b6945ac 100644
--- a/phpBB/adm/style/acp_main.html
+++ b/phpBB/adm/style/acp_main.html
@@ -40,6 +40,12 @@
 		</div>
 	<!-- ENDIF -->
 
+	<!-- IF S_PHP_VERSION_OLD -->
+		<div class="errorbox notice">
+			<p>{L_PHP_VERSION_OLD}</p>
+		</div>
+	<!-- ENDIF -->
+
 	<table cellspacing="1">
 		<caption>{L_FORUM_STATS}</caption>
 		<col class="col1" /><col class="col2" /><col class="col1" /><col class="col2" />
diff --git a/phpBB/docs/CHANGELOG.html b/phpBB/docs/CHANGELOG.html
index 8f947e2f35..af2c4fd78f 100644
--- a/phpBB/docs/CHANGELOG.html
+++ b/phpBB/docs/CHANGELOG.html
@@ -164,10 +164,10 @@
 		<li>[Change] SQLite is no longer autoloaded by the installer. (Bug #56105)</li>
 		<li>[Change] Friends and foes will not show up as private message rule options if their respective UCP modules are disabled. (Bug #51155)</li>
 		<li>[Change] Offer for guests to log in for egosearch and unreadposts search before the search permissions check. (Bug #51585)</li>
+		<li>[Change] Show warning box for users of PHP &lt; 5.2.0 about phpBB ending support.</li>
 		<li>[Change] Disallow deleting the last question of the Q&amp;A CAPTCHA.</li>
 		<li>[Change] Tweak Q&amp;A CAPTCHA garbage collection.</li>
 		<li>[Change] Show a proper preview for the Q&amp;A CAPTCHA. (Bug #56365)</li>
-
 		<li>[Feature] Ability to use HTTP authentication in ATOM feeds by passing the GET parameter &quot;auth=http&quot;.</li>
 	</ul>
 
diff --git a/phpBB/includes/acp/acp_main.php b/phpBB/includes/acp/acp_main.php
index cd83c52e01..b8712b2a3d 100644
--- a/phpBB/includes/acp/acp_main.php
+++ b/phpBB/includes/acp/acp_main.php
@@ -398,6 +398,14 @@ class acp_main
 		// Version check
 		$user->add_lang('install');
 
+		if ($auth->acl_get('a_server') && version_compare(PHP_VERSION, '5.2.0', '<'))
+		{
+			$template->assign_vars(array(
+				'S_PHP_VERSION_OLD'	=> true,
+				'L_PHP_VERSION_OLD'	=> sprintf($user->lang['PHP_VERSION_OLD'], '<a href="http://www.phpbb.com/community/viewtopic.php?f=14&amp;t=1958605">', '</a>'),
+			));
+		}
+
 		$latest_version_info = false;
 		if (($latest_version_info = obtain_latest_version_info(request_var('versioncheck_force', false))) === false)
 		{
diff --git a/phpBB/language/en/acp/common.php b/phpBB/language/en/acp/common.php
index 77f388c8a4..bca19c7f12 100644
--- a/phpBB/language/en/acp/common.php
+++ b/phpBB/language/en/acp/common.php
@@ -339,6 +339,8 @@ $lang = array_merge($lang, array(
 	'NUMBER_USERS'		=> 'Number of users',
 	'NUMBER_ORPHAN'		=> 'Orphan attachments',
 
+	'PHP_VERSION_OLD'	=> 'The version of PHP on this server will no longer be supported by future versions of phpBB. %sDetails%s',
+
 	'POSTS_PER_DAY'		=> 'Posts per day',
 
 	'PURGE_CACHE'			=> 'Purge the cache',