diff --git a/lib/response.js b/lib/response.js
index 371875f..b7d77de 100644
--- a/lib/response.js
+++ b/lib/response.js
@@ -211,7 +211,7 @@ module.exports = {
       return;
     }
 
-    return ~~len;
+    return Math.trunc(len) || 0;
   },
 
   /**