diff --git a/Message/Http/Rest.php b/Message/Http/Rest.php
index edf7f29a0..3245246c6 100644
--- a/Message/Http/Rest.php
+++ b/Message/Http/Rest.php
@@ -69,6 +69,6 @@ final class Rest
 
         \curl_close($curl);
 
-        return $result === false ? '' : $result;
+        return \is_bool($result) ? '' : $result;
     }
 }