diff --git a/Objects/dictobject.c b/Objects/dictobject.c
index cdf0dfa..d3a7cb9 100644
--- a/Objects/dictobject.c
+++ b/Objects/dictobject.c
@@ -2032,6 +2032,16 @@
 	return dictiter_new(dict, &PyDictIterItem_Type);
 }
 
+static PyObject *
+dict_sizeof(PyDictObject *mp)
+{
+	Py_ssize_t res;
+
+	res = sizeof(PyDictObject) + sizeof(mp->ma_table);
+	if (mp->ma_table != mp->ma_smalltable)
+		res = res + (mp->ma_mask + 1) * sizeof(PyDictEntry);
+	return PyInt_FromSsize_t(res);
+}
 
 PyDoc_STRVAR(has_key__doc__,
 "D.has_key(k) -> True if D has a key k, else False");
@@ -2041,6 +2051,9 @@
 
 PyDoc_STRVAR(getitem__doc__, "x.__getitem__(y) <==> x[y]");
 
+PyDoc_STRVAR(sizeof__doc__,
+"D.__sizeof__() -> size of D in bytes");
+
 PyDoc_STRVAR(get__doc__,
 "D.get(k[,d]) -> D[k] if k in D, else d.  d defaults to None.");
 
@@ -2092,6 +2105,8 @@
 	 contains__doc__},
 	{"__getitem__", (PyCFunction)dict_subscript,	METH_O | METH_COEXIST,
 	 getitem__doc__},
+	{"__sizeof__",	(PyCFunction)dict_sizeof,	METH_NOARGS,
+	 sizeof__doc__},
 	{"has_key",	(PyCFunction)dict_has_key,      METH_O,
 	 has_key__doc__},
 	{"get",         (PyCFunction)dict_get,          METH_VARARGS,