diff --git a/django/http/__init__.py b/django/http/__init__.py
index 7f198a7b08..2a88ee1950 100644
--- a/django/http/__init__.py
+++ b/django/http/__init__.py
@@ -615,7 +615,7 @@ class HttpResponse(object):
     def items(self):
         return self._headers.values()
 
-    def get(self, header, alternate):
+    def get(self, header, alternate=None):
         return self._headers.get(header.lower(), (None, alternate))[1]
 
     def set_cookie(self, key, value='', max_age=None, expires=None, path='/',
diff --git a/tests/regressiontests/httpwrappers/tests.py b/tests/regressiontests/httpwrappers/tests.py
index fbed94413b..493109a38e 100644
--- a/tests/regressiontests/httpwrappers/tests.py
+++ b/tests/regressiontests/httpwrappers/tests.py
@@ -243,6 +243,13 @@ class HttpResponseTests(unittest.TestCase):
         self.assertRaises(BadHeaderError, r.__setitem__, 'test\rstr', 'test')
         self.assertRaises(BadHeaderError, r.__setitem__, 'test\nstr', 'test')
 
+    def test_dict_behavior(self):
+        """
+        Test for bug #14020: Make HttpResponse.get work like dict.get
+        """
+        r = HttpResponse()
+        self.assertEqual(r.get('test'), None)
+
 class CookieTests(unittest.TestCase):
     def test_encode(self):
         """