From 314fd71ee7850897a7541a746f73f583b7281231 Mon Sep 17 00:00:00 2001
From: Niklas Correnz <uncaught42@gmail.com>
Date: Wed, 20 May 2026 11:25:00 +0200
Subject: [PATCH] Fix interface_exists call for guzzle interface (fixes #133)

---
 src/Core/Client/RetryDecoratingClient.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/Core/Client/RetryDecoratingClient.php b/src/Core/Client/RetryDecoratingClient.php
index dfe03a5d..d30fad82 100644
--- a/src/Core/Client/RetryDecoratingClient.php
+++ b/src/Core/Client/RetryDecoratingClient.php
@@ -108,7 +108,7 @@ private function doSend(RequestInterface $request, ?float $timeout): ResponseInt
             return $this->client->sendRequest($request);
         }
 
-        if (class_exists('GuzzleHttp\ClientInterface')
+        if (interface_exists('GuzzleHttp\ClientInterface')
             && $this->client instanceof \GuzzleHttp\ClientInterface
         ) {
             return $this->client->send($request, ['timeout' => $timeout]);