diff --git a/src/OAuth2/OAuth2RpcActions.php b/src/OAuth2/OAuth2RpcActions.php
index 78e6115..394e3e0 100644
--- a/src/OAuth2/OAuth2RpcActions.php
+++ b/src/OAuth2/OAuth2RpcActions.php
@@ -62,7 +62,7 @@ final class OAuth2RpcActions extends RpcActionHandler {
         }
 
         if($tokenInfo->hasExpired())
-            return ['method' => 'bearer', 'error' => 'expires'];
+            return ['method' => 'bearer', 'error' => 'expired'];
 
         return [
             'method' => 'bearer',