diff --git a/src/Composer/Downloader/FileDownloader.php b/src/Composer/Downloader/FileDownloader.php
index 025cce3a0..1fd183650 100644
--- a/src/Composer/Downloader/FileDownloader.php
+++ b/src/Composer/Downloader/FileDownloader.php
@@ -14,7 +14,6 @@ namespace Composer\Downloader;
 
 use Composer\Config;
 use Composer\Cache;
-use Composer\Factory;
 use Composer\IO\IOInterface;
 use Composer\IO\NullIO;
 use Composer\Package\Comparer\Comparer;
@@ -22,7 +21,6 @@ use Composer\DependencyResolver\Operation\UpdateOperation;
 use Composer\DependencyResolver\Operation\InstallOperation;
 use Composer\DependencyResolver\Operation\UninstallOperation;
 use Composer\Package\PackageInterface;
-use Composer\Package\Version\VersionParser;
 use Composer\Plugin\PluginEvents;
 use Composer\Plugin\PostFileDownloadEvent;
 use Composer\Plugin\PreFileDownloadEvent;
@@ -310,7 +308,7 @@ class FileDownloader implements DownloaderInterface, ChangeReportInterface
 
         $this->filesystem->emptyDirectory($path);
         $this->filesystem->ensureDirectoryExists($path);
-        $this->filesystem->rename($this->getFileName($package, $path), $path . pathinfo(parse_url($package->getDistUrl(), PHP_URL_PATH), PATHINFO_BASENAME));
+        $this->filesystem->rename($this->getFileName($package, $path), $path . '/' . pathinfo(parse_url($package->getDistUrl(), PHP_URL_PATH), PATHINFO_BASENAME));
     }
 
     /**