PEP 3123: Provide forward compatibility with Python 3.0, while keeping
backwards compatibility. Add Py_Refcnt, Py_Type, Py_Size, and
PyVarObject_HEAD_INIT.
diff --git a/PC/_winreg.c b/PC/_winreg.c
index 920e1d1..9ddbb23 100644
--- a/PC/_winreg.c
+++ b/PC/_winreg.c
@@ -460,8 +460,7 @@
 /* The type itself */
 PyTypeObject PyHKEY_Type =
 {
-	PyObject_HEAD_INIT(0) /* fill in type at module init */
-	0,
+	PyVarObject_HEAD_INIT(0, 0) /* fill in type at module init */
 	"PyHKEY",
 	sizeof(PyHKEYObject),
 	0,