diff --git a/src/Symfony/Component/Config/ConfigCache.php b/src/Symfony/Component/Config/ConfigCache.php
index 1f6e07c20b917..c719921715a67 100644
--- a/src/Symfony/Component/Config/ConfigCache.php
+++ b/src/Symfony/Component/Config/ConfigCache.php
@@ -108,7 +108,7 @@ public function write($content, array $metadata = null)
         $mode = 0666;
         $umask = umask();
         $filesystem = new Filesystem();
-        $filesystem->dumpFile($this->file, $content, null);
+        $filesystem->dumpFile($this->file, $content);
         try {
             $filesystem->chmod($this->file, $mode, $umask);
         } catch (IOException $e) {
@@ -116,7 +116,7 @@ public function write($content, array $metadata = null)
         }
 
         if (null !== $metadata && true === $this->debug) {
-            $filesystem->dumpFile($this->getMetaFile(), serialize($metadata), null);
+            $filesystem->dumpFile($this->getMetaFile(), serialize($metadata));
             try {
                 $filesystem->chmod($this->getMetaFile(), $mode, $umask);
             } catch (IOException $e) {