1 files changed, 3 insertions, 6 deletions
diff --git a/coverage/codeunit.py b/coverage/codeunit.py
index f54bda5e..55f44a24 100644
--- a/coverage/codeunit.py
+++ b/coverage/codeunit.py
@@ -1,8 +1,8 @@
 """Code unit (module) handling for Coverage."""
 
-import glob, os, tokenize
+import glob, os
 
-from coverage.backward import string_class, StringIO
+from coverage.backward import open_source, string_class, StringIO
 from coverage.misc import CoverageException
 
 
@@ -104,10 +104,7 @@ class CodeUnit(object):
         """Return an open file for reading the source of the code unit."""
         if os.path.exists(self.filename):
             # A regular text file: open it.
-            if hasattr(tokenize, 'open'):  # Python 3.2 and later
-                return tokenize.open(self.filename)
-            else:
-                return open(self.filename)
+            return open_source(self.filename)
 
         # Maybe it's in a zip file?
         source = self.file_locator.get_zip_data(self.filename)