diff --git a/src/App/Creator/ResponseCreator.php b/src/App/Creator/ResponseCreator.php
index c8a6907f..a955610b 100644
--- a/src/App/Creator/ResponseCreator.php
+++ b/src/App/Creator/ResponseCreator.php
@@ -26,7 +26,7 @@ public function createEmptyResponse(JsonRpcRequest $fromRequest = null) : JsonRp
                 ->setIsNotification($fromRequest->isNotification())
         ;
 
-        if ($fromRequest->getId()) {
+        if (!is_null($fromRequest->getId())) {
             $response->setId($fromRequest->getId());
         }