--- a/unixSoft/bin/patchpipe
+++ b/unixSoft/bin/patchpipe
@@ -5,14 +5,14 @@ import subprocess
 import sys
 import tempfile
 
-_PATCHHDR = '# HG changeset patch'
+_PATCHHDR = b'# HG changeset patch'
 
-_BASE64_MAGIC = 'Content-Transfer-Encoding: base64'
+_BASE64_MAGIC = b'Content-Transfer-Encoding: base64'
 
 
 def main(argv):
     tf = tempfile.NamedTemporaryFile(suffix='.diff')
-    d = sys.stdin.read()
+    d = sys.stdin.buffer.read()
     if _PATCHHDR in d:
         junk, d = d.split(_PATCHHDR, 1)
         d = _PATCHHDR + d
@@ -23,7 +23,7 @@ def main(argv):
     tf.flush()
     subprocess.check_call([os.environ['EDITOR'], tf.name],
                           stdout=sys.stderr)
-    sys.stdout.write(open(tf.name).read())
+    sys.stdout.buffer.write(open(tf.name, 'rb').read())
 
 
 if __name__ == '__main__':