1 files changed, 3 insertions, 0 deletions
diff --git a/src/saml2/httputil.py b/src/saml2/httputil.py
index 0901f7b0..0e7f32a6 100644
--- a/src/saml2/httputil.py
+++ b/src/saml2/httputil.py
@@ -62,6 +62,9 @@ class Response(object):
             return [mte.render(**argv)]
         else:
             if isinstance(message, six.string_types):
+                # Note(JP): A WSGI app should always respond
+                # with bytes, so at this point the message should
+                # become encoded instead of passing a text object.
                 return [message]
             elif isinstance(message, six.binary_type):
                 return [message]