diff --git a/lib/serializer.js b/lib/serializer.js
index 0f4dde76..8f39d665 100644
--- a/lib/serializer.js
+++ b/lib/serializer.js
@@ -100,7 +100,7 @@ module.exports = class Serializer {
       // have a fast case for them
       let result = ''
       let last = -1
-      let point = 255
+      let point
       for (let i = 0; i < len; i++) {
         point = str.charCodeAt(i)
         if (