diff --git a/src/Transport/CurlTransport.php b/src/Transport/CurlTransport.php
index 0c6806e..746f0f2 100644
--- a/src/Transport/CurlTransport.php
+++ b/src/Transport/CurlTransport.php
@@ -98,7 +98,7 @@ abstract class CurlTransport {
                     $response = $response->withHeader($key, $value);
                 }
                 elseif ( strtoupper(substr($headerLine, 0, 4)) === 'HTTP' ) {
-                    list(,$code, $status) = explode(' ', trim($headerLine), 3);
+                    list(,$code, $status) = explode(' ', trim($headerLine), 3) + [ null, null, null ];
 
                     $response = $response->withStatus($code, $status);
                 }