1 files changed, 2 insertions, 7 deletions
diff --git a/django/http/response.py b/django/http/response.py
index 929129342f..ab7158f7e0 100644
--- a/django/http/response.py
+++ b/django/http/response.py
@@ -5,7 +5,6 @@ import os
 import re
 import sys
 import time
-from collections.abc import Mapping
 from email.header import Header
 from http.client import responses
 from urllib.parse import quote, urlparse
@@ -16,9 +15,7 @@ from django.core.exceptions import DisallowedRedirect
 from django.core.serializers.json import DjangoJSONEncoder
 from django.http.cookie import SimpleCookie
 from django.utils import timezone
-from django.utils.datastructures import (
-    CaseInsensitiveMapping, _destruct_iterable_mapping_values,
-)
+from django.utils.datastructures import CaseInsensitiveMapping
 from django.utils.encoding import iri_to_uri
 from django.utils.http import http_date
 from django.utils.regex_helper import _lazy_re_compile
@@ -32,10 +29,8 @@ class ResponseHeaders(CaseInsensitiveMapping):
         Populate the initial data using __setitem__ to ensure values are
         correctly encoded.
         """
-        if not isinstance(data, Mapping):
-            data = {k: v for k, v in _destruct_iterable_mapping_values(data)}
         self._store = {}
-        for header, value in data.items():
+        for header, value in self._unpack_items(data):
             self[header] = value
 
     def _convert_to_charset(self, value, charset, mime_encode=False):