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/Python/import.c b/Python/import.c
index 038c856..678a30b 100644
--- a/Python/import.c
+++ b/Python/import.c
@@ -3030,8 +3030,7 @@
 
 
 static PyTypeObject NullImporterType = {
-	PyObject_HEAD_INIT(NULL)
-	0,                         /*ob_size*/
+	PyVarObject_HEAD_INIT(NULL, 0)
 	"imp.NullImporter",        /*tp_name*/
 	sizeof(NullImporter),      /*tp_basicsize*/
 	0,                         /*tp_itemsize*/