diff --git a/src/Http/Client/Adapter/Curl.php b/src/Http/Client/Adapter/Curl.php
index 040baae447c..44e8f51163e 100644
--- a/src/Http/Client/Adapter/Curl.php
+++ b/src/Http/Client/Adapter/Curl.php
@@ -44,7 +44,7 @@ public function send(Request $request, array $options)
             curl_close($ch);
 
             $status = 500;
-            if ($error === 28) {
+            if ($errorCode === 28) {
                 $status = 504;
             }
             throw new HttpException("cURL Error ({$errorCode}) {$error}", $status);