diff --git a/hgdemandimport/py3tokenize.py b/hgdemandimport/py3tokenize.py
--- a/hgdemandimport/py3tokenize.py
+++ b/hgdemandimport/py3tokenize.py
@@ -61,6 +61,7 @@
 # * Removed module docstring.
 # * Adjusted for relative imports.
 # * absolute_import added.
+# * Removed re.ASCII.
 
 from __future__ import absolute_import
 
@@ -75,8 +76,8 @@
 import re
 from .py3token import *
 
-cookie_re = re.compile(r'^[ \t\f]*#.*?coding[:=][ \t]*([-\w.]+)', re.ASCII)
-blank_re = re.compile(br'^[ \t\f]*(?:[#\r\n]|$)', re.ASCII)
+cookie_re = re.compile(r'^[ \t\f]*#.*?coding[:=][ \t]*([-\w.]+)')
+blank_re = re.compile(br'^[ \t\f]*(?:[#\r\n]|$)')
 
 from . import py3token
 __all__ = py3token.__all__ + ["tokenize", "detect_encoding",