diff -r bbe6b215df5d Lib/test/test_property.py
--- a/Lib/test/test_property.py	Fri Aug 14 11:06:43 2015 -0700
+++ b/Lib/test/test_property.py	Fri Aug 14 15:24:44 2015 -0400
@@ -207,6 +207,19 @@
             Foo.spam.__doc__,
             "spam wrapped in property subclass")
 
+    def test_docstring_via_new(self):
+        """Regression test for issue24766"""
+
+        class Foo(object):
+            def _get_spam(self):
+                return 1
+
+            spam = PropertySub(_get_spam, doc="spam as property subclass")
+
+        self.assertEqual(
+            Foo.spam.__doc__,
+            "spam as property subclass")
+
     @unittest.skipIf(sys.flags.optimize >= 2,
                      "Docstrings are omitted with -O2 and above")
     def test_property_setter_copies_getter_docstring(self):