python
diff --git a/‎Objects/unionobject.c‎
Lines changed: 1 addition & 1 deletion b/‎Objects/unionobject.c‎
Lines changed: 1 addition & 1 deletion
@@ -371,7 +371,7 @@ union_reduce(PyObject *self, PyObject *Py_UNUSED(ignored))
         return NULL;
     }
 
-    return Py_BuildValue("O(O)", from_args, alias->args);
+    return Py_BuildValue("N(O)", from_args, alias->args);
 }
 
 static PyMemberDef union_members[] = {
Original file line number	Diff line number	Diff line change
`@@ -371,7 +371,7 @@ union_reduce(PyObject self, PyObject Py_UNUSED(ignored))`
`371`	`371`	`return NULL;`
`372`	`372`	`}`
`373`	`373`
`374`		`- return Py_BuildValue("O(O)", from_args, alias->args);`
	`374`	`+ return Py_BuildValue("N(O)", from_args, alias->args);`
`375`	`375`	`}`
`376`	`376`
`377`	`377`	`static PyMemberDef union_members[] = {`