diff --git a/src/Symfony/Bridge/Twig/DataCollector/TwigDataCollector.php b/src/Symfony/Bridge/Twig/DataCollector/TwigDataCollector.php
index 382ce13987cc3..f28c92422ae48 100644
--- a/src/Symfony/Bridge/Twig/DataCollector/TwigDataCollector.php
+++ b/src/Symfony/Bridge/Twig/DataCollector/TwigDataCollector.php
@@ -96,7 +96,7 @@ public function getHtmlCallGraph()
     public function getProfile()
     {
         if (null === $this->profile) {
-            if (PHP_VERSION_ID >= 70000) {
+            if (\PHP_VERSION_ID >= 70000) {
                 $this->profile = unserialize($this->data['profile'], array('allowed_classes' => array('Twig_Profiler_Profile', 'Twig\Profiler\Profile')));
             } else {
                 $this->profile = unserialize($this->data['profile']);