diff --git a/Lib/unittest/mock.py b/Lib/unittest/mock.py
--- a/Lib/unittest/mock.py
+++ b/Lib/unittest/mock.py
@@ -60,14 +60,10 @@
     )
 
 
-class _slotted(object):
-    __slots__ = ['a']
-
-
-DescriptorTypes = (
-    type(_slotted.a),
-    property,
-)
+def _is_data_descriptor(obj):
+    # Data descriptors are Properties, slots, getsets and C data members.
+    return ((hasattr(obj, '__set__') or hasattr(obj, '__del__')) and
+            hasattr(obj, '__get__'))
 
 
 def _get_signature_object(func, as_instance, eat_self):
@@ -2147,7 +2143,7 @@
     _kwargs.update(kwargs)
 
     Klass = MagicMock
-    if type(spec) in DescriptorTypes:
+    if _is_data_descriptor(spec):
         # descriptors don't have a spec
         # because we don't know what type they return
         _kwargs = {}
diff --git a/Lib/unittest/test/testmock/testhelpers.py b/Lib/unittest/test/testmock/testhelpers.py
--- a/Lib/unittest/test/testmock/testhelpers.py
+++ b/Lib/unittest/test/testmock/testhelpers.py
@@ -833,6 +833,32 @@
         mock_slot.abc.assert_called_once_with(4, 5, 6)
 
 
+    def test_autospec_data_descriptor(self):
+        class Descriptor(object):
+            def __init__(self, value):
+                self.value = value
+
+            def __get__(self, obj, cls=None):
+                if obj is None:
+                    return self
+                return self.value
+
+            def __set__(self, obj, value):
+                pass
+
+        class Foo(object):
+            foo = Descriptor(42)
+
+        foo = create_autospec(Foo)
+        mock_descr = foo.foo
+
+        # no spec on data descriptors
+        self.assertTrue(isinstance(mock_descr, MagicMock))
+        mock_descr(1, 2, 3)
+        mock_descr.abc(4, 5, 6)
+        mock_descr.assert_called_once_with(1, 2, 3)
+
+
 class TestCallList(unittest.TestCase):
 
     def test_args_list_contains_call_list(self):