diff --git a/src/Storage/AbstractStorage.php b/src/Storage/AbstractStorage.php
index 5c18e7b8..b932e5a0 100644
--- a/src/Storage/AbstractStorage.php
+++ b/src/Storage/AbstractStorage.php
@@ -16,7 +16,7 @@ use League\OAuth2\Server\AbstractServer;
 /**
  * Abstract storage class
  */
-abstract class AbstractStorage
+abstract class AbstractStorage implements StorageInterface
 {
     /**
      * Server
diff --git a/src/Storage/StorageInterface.php b/src/Storage/StorageInterface.php
new file mode 100644
index 00000000..ae9f0c74
--- /dev/null
+++ b/src/Storage/StorageInterface.php
@@ -0,0 +1,26 @@
+<?php
+/**
+ * OAuth 2.0 Storage interface
+ *
+ * @package     league/oauth2-server
+ * @author      Alex Bilbie <hello@alexbilbie.com>
+ * @copyright   Copyright (c) Alex Bilbie
+ * @license     http://mit-license.org/
+ * @link        https://github.com/thephpleague/oauth2-server
+ */
+
+namespace League\OAuth2\Server\Storage;
+
+use League\OAuth2\Server\Entity\SessionEntity;
+
+/**
+ * Storage interface
+ */
+interface StorageInterface
+{
+    /**
+     * Set the server
+     * @param \League\OAuth2\Server\AbstractServer $server
+     */
+    public function setServer(AbstractServer $server);
+}