diff --git a/src/Symfony/Component/HttpFoundation/Request.php b/src/Symfony/Component/HttpFoundation/Request.php
index d84dbefa7c..f38560473a 100644
--- a/src/Symfony/Component/HttpFoundation/Request.php
+++ b/src/Symfony/Component/HttpFoundation/Request.php
@@ -850,7 +850,7 @@ class Request
      * ("Client-Ip" for instance), configure it via "setTrustedHeaderName()" with
      * the "client-ip" key.
      *
-     * @return string The client IP address
+     * @return string|null The client IP address
      *
      * @see getClientIps()
      * @see http://en.wikipedia.org/wiki/X-Forwarded-For