diff --git a/src/Symfony/Component/HttpKernel/EventListener/RouterListener.php b/src/Symfony/Component/HttpKernel/EventListener/RouterListener.php
index 606b358e72..ce51c3f9fc 100644
--- a/src/Symfony/Component/HttpKernel/EventListener/RouterListener.php
+++ b/src/Symfony/Component/HttpKernel/EventListener/RouterListener.php
@@ -93,7 +93,7 @@ class RouterListener implements EventSubscriberInterface
 
             throw new NotFoundHttpException($message, $e);
         } catch (MethodNotAllowedException $e) {
-            $message = sprintf('No route found for "%s %s": Method Not Allowed (Allow: %s)', $request->getMethod(), $request->getPathInfo(), strtoupper(implode(', ', $e->getAllowedMethods())));
+            $message = sprintf('No route found for "%s %s": Method Not Allowed (Allow: %s)', $request->getMethod(), $request->getPathInfo(), implode(', ', $e->getAllowedMethods()));
 
             throw new MethodNotAllowedHttpException($e->getAllowedMethods(), $message, $e);
         }