diff --git a/src/League/OAuth2/Server/Storage/PDO/Session.php b/src/League/OAuth2/Server/Storage/PDO/Session.php
index 87716522..d03446d6 100644
--- a/src/League/OAuth2/Server/Storage/PDO/Session.php
+++ b/src/League/OAuth2/Server/Storage/PDO/Session.php
@@ -161,6 +161,16 @@ class Session implements SessionInterface
         return ($result === false) ? false : (array) $result;
     }
 
+    public function associateAuthCodeScope($sessionId, $scopeId)
+    {
+        $db = \ezcDbInstance::get();
+
+        $stmt = $db->prepare('INSERT INTO `oauth_session_authcode_scopes` (`session_id`, `scope_id`) VALUES (:sessionId, :scopeId)');
+        $stmt->bindValue(':sessionId', $sessionId);
+        $stmt->bindValue(':scopeId', $scopeId);
+        $stmt->execute();
+    }
+
     public function associateScope($accessTokenId, $scopeId)
     {
         $db = \ezcDbInstance::get();