diff --git a/src/Composer/Downloader/DownloaderInterface.php b/src/Composer/Downloader/DownloaderInterface.php
index 6e78ee3c9..b424bba3e 100644
--- a/src/Composer/Downloader/DownloaderInterface.php
+++ b/src/Composer/Downloader/DownloaderInterface.php
@@ -31,5 +31,5 @@ interface DownloaderInterface
      *
      * @throws \UnexpectedValueException
      */
-    public function download(PackageInterface $package, $path, $url, $checksum = null);
+    function download(PackageInterface $package, $path, $url, $checksum = null);
 }
diff --git a/src/Composer/Installer/InstallerInterface.php b/src/Composer/Installer/InstallerInterface.php
index 8c63a592a..6a3ac6fbd 100644
--- a/src/Composer/Installer/InstallerInterface.php
+++ b/src/Composer/Installer/InstallerInterface.php
@@ -29,5 +29,5 @@ interface InstallerInterface
      * @param DownloaderInterface $downloader
      * @param string              $type
      */
-    public function install(PackageInterface $package, DownloaderInterface $downloader, $type);
+    function install(PackageInterface $package, DownloaderInterface $downloader, $type);
 }