diff --git a/src/Composer/DependencyResolver/Pool.php b/src/Composer/DependencyResolver/Pool.php
index 864bb38dd..7d95f4d15 100644
--- a/src/Composer/DependencyResolver/Pool.php
+++ b/src/Composer/DependencyResolver/Pool.php
@@ -45,6 +45,11 @@ class Pool
         }
     }
 
+    public function getPriority(RepositoryInterface $repo)
+    {
+        return array_search($repo, $this->repositories, true);
+    }
+
     /**
     * Retrieves the package object for a given package id.
     *