diff --git a/Python/ast.c b/Python/ast.c
index 9664590..f3e611b 100644
--- a/Python/ast.c
+++ b/Python/ast.c
@@ -107,7 +107,7 @@
 	Py_DECREF(errstr);
 	return;
     }
-    value = Py_BuildValue("(OO)", errstr, tmp);
+    value = PyTuple_Pack(2, errstr, tmp);
     Py_DECREF(errstr);
     Py_DECREF(tmp);
     if (!value)