diff --git a/phpBB/feed.php b/phpBB/feed.php
index 4b1836497b..9816f0f303 100644
--- a/phpBB/feed.php
+++ b/phpBB/feed.php
@@ -173,6 +173,12 @@ if (defined('DEBUG_EXTRA') && request_var('explain', 0) && $auth->acl_get('a_'))
 header("Content-Type: application/atom+xml; charset=UTF-8");
 header("Last-Modified: " . gmdate('D, d M Y H:i:s', $feed_updated_time) . ' GMT');
 
+if (!empty($user->data['is_bot']))
+{
+	// Let reverse proxies know we detected a bot.
+	header('X-PHPBB-IS-BOT: yes');
+}
+
 echo '<?xml version="1.0" encoding="UTF-8"?>' . "\n";
 echo '<feed xmlns="http://www.w3.org/2005/Atom" xml:lang="' . $global_vars['FEED_LANG'] . '">' . "\n";
 echo '<link rel="self" type="application/atom+xml" href="' . $global_vars['SELF_LINK'] . '" />' . "\n\n";
diff --git a/phpBB/includes/functions.php b/phpBB/includes/functions.php
index 6b6679bde5..df49bdf637 100644
--- a/phpBB/includes/functions.php
+++ b/phpBB/includes/functions.php
@@ -4641,6 +4641,12 @@ function page_header($page_title = '', $display_online_list = true, $item_id = 0
 	header('Expires: 0');
 	header('Pragma: no-cache');
 
+	if (!empty($user->data['is_bot']))
+	{
+		// Let reverse proxies know we detected a bot.
+		header('X-PHPBB-IS-BOT: yes');
+	}
+
 	return;
 }