Index: Objects/boolobject.c
===================================================================
--- Objects/boolobject.c	(revision 66040)
+++ Objects/boolobject.c	(working copy)
@@ -54,6 +54,12 @@
 	return PyBool_FromLong(ok);
 }
 
+static PyObject *
+bool_sizeof(PyObject *b)
+{
+	return PyLong_FromSsize_t(sizeof(struct _longobject));
+}
+
 /* Arithmetic operations redefined to return bool if both args are bool. */
 
 static PyObject *
@@ -89,6 +95,12 @@
 The builtins True and False are the only two instances of the class bool.\n\
 The class bool is a subclass of the class int, and cannot be subclassed.");
 
+static PyMethodDef bool_methods[] = {
+	{"__sizeof__",	(PyCFunction)bool_sizeof, METH_NOARGS,
+	 "Returns size in memory, in bytes"},
+	{NULL,		NULL}		/* sentinel */
+};
+
 /* Arithmetic methods -- only so we can override &, |, ^. */
 
 static PyNumberMethods bool_as_number = {
@@ -158,7 +170,7 @@
 	0,					/* tp_weaklistoffset */
 	0,					/* tp_iter */
 	0,					/* tp_iternext */
-	0,					/* tp_methods */
+	bool_methods,				/* tp_methods */
 	0,					/* tp_members */
 	0,					/* tp_getset */
 	&PyLong_Type,				/* tp_base */
Index: Lib/test/test_sys.py
===================================================================
--- Lib/test/test_sys.py	(revision 66040)
+++ Lib/test/test_sys.py	(working copy)
@@ -414,7 +414,7 @@
         size = self.calcsize
         gc_header_size = self.gc_headsize
         # bool objects are not gc tracked
-        self.assertEqual(sys.getsizeof(True), size(vh) + self.H)
+        self.assertEqual(sys.getsizeof(True), size(vh + 'H'))
         # but lists are
         self.assertEqual(sys.getsizeof([]), size(vh + 'PP') + gc_header_size)
 
@@ -422,8 +422,8 @@
         h = self.header
         vh = self.vheader
         size = self.calcsize
-        self.assertEqual(sys.getsizeof(True), size(vh) + self.H)
-        self.assertEqual(sys.getsizeof(True, -1), size(vh) + self.H)
+        self.assertEqual(sys.getsizeof(True), size(vh + 'H'))
+        self.assertEqual(sys.getsizeof(True, -1), size(vh + 'H'))
 
     def test_objecttypes(self):
         # check all types defined in Objects/
@@ -432,7 +432,8 @@
         size = self.calcsize
         check = self.check_sizeof
         # bool
-        check(True, size(vh) + self.H)
+        check(True, size(vh + 'H'))
+        check(False, size(vh + 'H'))
         # buffer
         # XXX
         # builtin_function_or_method