diff --git a/www/modpythoncustom.py b/www/modpythoncustom.py
index f5e0a14e9641a9791df42ed79a93e976150e16d6..1d6380ec5c923e33e24e4c8e05c6bb9117f1d3f2 100644
--- a/www/modpythoncustom.py
+++ b/www/modpythoncustom.py
@@ -1,3 +1,4 @@
+from builtins import str
 from mod_python import apache
 
 # 404 should do NOTHING so apache can handle it.  This view is referenced
@@ -83,10 +84,10 @@ class ModPythonHandler(BaseHandler):
 
         # Convert our custom HttpResponse object back into the mod_python req.
         req.content_type = response['Content-Type']
-        for key, value in response.items():
+        for key, value in list(response.items()):
             if key != 'content-type':
                 req.headers_out[str(key)] = str(value)
-        for c in response.cookies.values():
+        for c in list(response.cookies.values()):
             req.headers_out.add('Set-Cookie', c.output(header=''))
         req.status = response.status_code
         try: