1 files changed, 3 insertions, 0 deletions
diff --git a/Include/objimpl.h b/Include/objimpl.h
index f475ed0..2337d8a 100644
--- a/Include/objimpl.h
+++ b/Include/objimpl.h
@@ -138,6 +138,9 @@ _PyObject_INIT(PyObject *op, PyTypeObject *typeobj)
 {
     assert(op != NULL);
     Py_TYPE(op) = typeobj;
+    if (PyType_GetFlags(typeobj) & Py_TPFLAGS_HEAPTYPE) {
+        Py_INCREF(typeobj);
+    }
     _Py_NewReference(op);
     return op;
 }