diff --git a/django/http/__init__.py b/django/http/__init__.py
index f2e1cda8ff..85d9b3b920 100644
--- a/django/http/__init__.py
+++ b/django/http/__init__.py
@@ -61,14 +61,14 @@ else:
         if not _cookie_allows_colon_in_names:
             def load(self, rawdata):
                 self.bad_cookies = set()
-                super(SimpleCookie, self).load(str(rawdata))
+                super(SimpleCookie, self).load(smart_str(rawdata))
                 for key in self.bad_cookies:
                     del self[key]
 
             # override private __set() method:
             # (needed for using our Morsel, and for laxness with CookieError
             def _BaseCookie__set(self, key, real_value, coded_value):
-                key = str(key)
+                key = smart_str(key)
                 try:
                     M = self.get(key, Morsel())
                     M.set(key, real_value, coded_value)
@@ -85,7 +85,7 @@ from django.core.files import uploadhandler
 from django.http.multipartparser import MultiPartParser
 from django.http.utils import *
 from django.utils.datastructures import MultiValueDict, ImmutableList
-from django.utils.encoding import smart_bytes, iri_to_uri, force_text
+from django.utils.encoding import smart_bytes, smart_str, iri_to_uri, force_text
 from django.utils.http import cookie_date
 from django.utils import six
 from django.utils import timezone
@@ -137,7 +137,7 @@ def build_request_repr(request, path_override=None, GET_override=None,
     except:
         meta = '<could not parse>'
     path = path_override if path_override is not None else request.path
-    return str('<%s\npath:%s,\nGET:%s,\nPOST:%s,\nCOOKIES:%s,\nMETA:%s>' %
+    return smart_str('<%s\npath:%s,\nGET:%s,\nPOST:%s,\nCOOKIES:%s,\nMETA:%s>' %
                      (request.__class__.__name__,
                       path,
                       six.text_type(get),