diff --git a/src/Composer/Package/Loader/RootPackageLoader.php b/src/Composer/Package/Loader/RootPackageLoader.php
index 8419a4863..3c6847c67 100644
--- a/src/Composer/Package/Loader/RootPackageLoader.php
+++ b/src/Composer/Package/Loader/RootPackageLoader.php
@@ -18,6 +18,7 @@ use Composer\Factory;
 use Composer\Package\Version\VersionParser;
 use Composer\Repository\RepositoryManager;
 use Composer\Repository\Vcs\HgDriver;
+use Composer\IO\NullIO;
 use Composer\Util\ProcessExecutor;
 
 /**