diff --git a/src/Composer/Installer.php b/src/Composer/Installer.php
index ca7deb3ac..55ec51baf 100644
--- a/src/Composer/Installer.php
+++ b/src/Composer/Installer.php
@@ -1309,7 +1309,7 @@ class Installer
             $skipPackages[$require->getTarget()] = true;
         }
 
-        $pool = new Pool;
+        $pool = new Pool('dev');
         $pool->addRepository($localOrLockRepo);
 
         $seen = array();