diff --git a/sip/siplib/siplib.c b/sip/siplib/siplib.c
index 55b93128..6369e689 100644
--- a/sip/siplib/siplib.c
+++ b/sip/siplib/siplib.c
@@ -9914,11 +9914,11 @@ static int sipWrapperType_init(sipWrapperType *self, PyObject *args,
          */
         if (base != NULL && PyObject_TypeCheck((PyObject *)base, (PyTypeObject *)&sipWrapperType_Type))
         {
-            self->wt_td = ((sipWrapperType *)base)->wt_td;
-
             /* Call any new type handler. */
             sipNewUserTypeFunc new_user_type_handler;
 
+            self->wt_td = ((sipWrapperType *)base)->wt_td;
+
             new_user_type_handler = find_new_user_type_handler(
                     (sipWrapperType *)sipTypeAsPyTypeObject(self->wt_td));