diff --git a/src/Composer/Repository/RepositoryFactory.php b/src/Composer/Repository/RepositoryFactory.php
index afe1db636..b36664187 100644
--- a/src/Composer/Repository/RepositoryFactory.php
+++ b/src/Composer/Repository/RepositoryFactory.php
@@ -173,6 +173,6 @@ class RepositoryFactory
             $name .= '2';
         }
 
-        return is_numeric((string) $name) ? 'repo'.$name : $name;
+        return $name;
     }
 }