diff --git a/components/http_foundation/trusting_proxies.rst b/components/http_foundation/trusting_proxies.rst
index fcd32d70b83..f514e97835d 100644
--- a/components/http_foundation/trusting_proxies.rst
+++ b/components/http_foundation/trusting_proxies.rst
@@ -24,6 +24,12 @@ your proxy.
 
     // only trust proxy headers coming from this IP addresses
     Request::setTrustedProxies(array('192.0.0.1', '10.0.0.0/8'));
+    
+.. note::
+
+   When using Symfony's internal reverse proxy (``AppCache.php``) make sure to add 
+   ``127.0.0.1`` to the list of trusted proxies.
+
 
 Configuring Header Names
 ------------------------