diff --git a/src/Composer/Downloader/ZipDownloader.php b/src/Composer/Downloader/ZipDownloader.php
index e1ee74381..88b2b51cf 100644
--- a/src/Composer/Downloader/ZipDownloader.php
+++ b/src/Composer/Downloader/ZipDownloader.php
@@ -133,7 +133,7 @@ class ZipDownloader extends ArchiveDownloader
      * @param string $file File to extract
      * @param string $path Path where to extract file
      */
-    public function extract($file, $path)
+    protected function extract($file, $path)
     {
         $resultZipArchive = NULL;
         $resultUnzip = NULL;