diff --git a/lib/SimpleSAML/Utils/HTTP.php b/lib/SimpleSAML/Utils/HTTP.php
index 8b0caf3077724ea5e33024a8cac71bbcf7316be9..fd6437eb5bb4c817b90206671a3b2064c5236e4d 100644
--- a/lib/SimpleSAML/Utils/HTTP.php
+++ b/lib/SimpleSAML/Utils/HTTP.php
@@ -313,15 +313,11 @@ class HTTP
 
         // get the white list of domains
         if ($trustedSites === null) {
-            $trustedSites = \SimpleSAML_Configuration::getInstance()->getArray('trusted.url.domains', null);
-            // TODO: remove this before 2.0
-            if ($trustedSites === null) {
-                $trustedSites = \SimpleSAML_Configuration::getInstance()->getArray('redirect.trustedsites', null);
-            }
+            $trustedSites = \SimpleSAML_Configuration::getInstance()->getValue('trusted.url.domains', array());
         }
 
         // validates the URL's host is among those allowed
-        if ($trustedSites !== null) {
+        if (is_array($trustedSites)) {
             assert(is_array($trustedSites));
             preg_match('@^https?://([^/]+)@i', $url, $matches);
             $hostname = $matches[1];