diff --git a/src/Symfony/Component/HttpFoundation/Request.php b/src/Symfony/Component/HttpFoundation/Request.php
index 01284cf724..546d0ffbd9 100644
--- a/src/Symfony/Component/HttpFoundation/Request.php
+++ b/src/Symfony/Component/HttpFoundation/Request.php
@@ -813,7 +813,7 @@ class Request
         }
 
         // Trim and remove port number from host
-        $host = trim(preg_replace('/:\d+$/', '', $host));
+        $host = preg_replace('/:\d+$/', '', trim($host));
 
         // as the host can come from the user (HTTP_HOST and depending on the configuration, SERVER_NAME too can come from the user)
         // check that it does not contain forbidden characters (see RFC 952 and RFC 2181)