diff --git a/asyncua/common/node.py b/asyncua/common/node.py
index 2baac13c7..5d5e1248b 100644
--- a/asyncua/common/node.py
+++ b/asyncua/common/node.py
@@ -809,7 +809,7 @@ async def add_object(
         self,
         nodeid: Union[ua.NodeId, str, int],
         bname: Union[ua.QualifiedName, str],
-        objecttype: Optional[int] = None,
+        objecttype: Optional[Union[ua.NodeId, int]] = None,
         instantiate_optional: bool = True,
     ) -> "Node":
         return await create_object(self, nodeid, bname, objecttype, instantiate_optional)