diff -u b/domain/src/DomainNegotiator.php b/domain/src/DomainNegotiator.php
--- b/domain/src/DomainNegotiator.php
+++ b/domain/src/DomainNegotiator.php
@@ -150,9 +150,9 @@
    * Determine the active domain.
    */
   protected function negotiateActiveDomain() {
+    $this->negotiated = TRUE;
     $httpHost = $this->negotiateActiveHostname();
     $this->setRequestDomain($httpHost);
-    $this->negotiated = TRUE;
   }
 
   /**