diff --git a/lib/utils.js b/lib/utils.js
index 18de154541..c43710e196 100644
--- a/lib/utils.js
+++ b/lib/utils.js
@@ -210,7 +210,7 @@ var isURLSearchParams = kindOfTest('URLSearchParams');
  * @returns {String} The String freed of excess whitespace
  */
 function trim(str) {
-  return str.trim ? str.trim() : str.replace(/^\s+|\s+$/g, '');
+  return str.trim ? str.trim() : str.replace(/^[\s\uFEFF\xA0]+|[\s\uFEFF\xA0]+$/g, '');
 }
 
 /**