diff --git a/src/Symfony/Bridge/Monolog/Handler/FirePHPHandler.php b/src/Symfony/Bridge/Monolog/Handler/FirePHPHandler.php
index ae0a1c55aa518..c790a8b37bff0 100644
--- a/src/Symfony/Bridge/Monolog/Handler/FirePHPHandler.php
+++ b/src/Symfony/Bridge/Monolog/Handler/FirePHPHandler.php
@@ -42,7 +42,9 @@ public function onKernelResponse(FilterResponseEvent $event)
             return;
         }
 
-        if (!preg_match('{\bFirePHP/\d+\.\d+\b}', $event->getRequest()->headers->get('User-Agent'))) {
+        if (!preg_match('{\bFirePHP/\d+\.\d+\b}', $event->getRequest()->headers->get('User-Agent'))
+            && !$event->getRequest()->headers->has('X-FirePHP-Version')) {
+            
             $this->sendHeaders = false;
             $this->headers = array();