diff --git a/retriever/retriever.php b/retriever/retriever.php
index cd8aacea..263f5842 100644
--- a/retriever/retriever.php
+++ b/retriever/retriever.php
@@ -639,6 +639,9 @@ function retriever_extract($doc, $retriever) {
  */
 function retriever_globalise_urls($doc, $resource) {
 	$components = parse_url($resource['redirect-url']);
+        if (!array_key_exists('scheme', $components) || !array_key_exists('host', $components) || !array_key_exists('path', $components)) {
+		return $doc;
+        }
 	$rooturl = $components['scheme'] . "://" . $components['host'];
 	$dirurl = $rooturl . dirname($components['path']) . "/";
 	$params = array('$dirurl' => $dirurl, '$rooturl' => $rooturl);