diff --git a/encoding/resources/single-byte-raw.py b/encoding/resources/single-byte-raw.py
index b4a6c90405ec85..494f37a185d31e 100644
--- a/encoding/resources/single-byte-raw.py
+++ b/encoding/resources/single-byte-raw.py
@@ -1,3 +1,3 @@
 def main(request, response):
   response.headers.set("Content-Type", "text/plain;charset=" + request.GET.first("label"))
-  response.content = "".join(chr(byte) for byte in xrange(255))
+  response.content = "".join(chr(byte) for byte in range(255))