diff --git a/src/HttpClient/HttpClient.php b/src/HttpClient/HttpClient.php
index 96a3dd01a..9f0b9fcea 100644
--- a/src/HttpClient/HttpClient.php
+++ b/src/HttpClient/HttpClient.php
@@ -40,7 +40,7 @@ public function sendRequest(Request $request, Options $options): Response
             throw new \RuntimeException('The request data is empty.');
         }
 
-        $curlHandle = curl_init();
+        $curlHandle = \curl_init();
 
         $requestHeaders = Http::getRequestHeaders($dsn, $this->sdkIdentifier, $this->sdkVersion);