diff --git a/src/RestrictedPython/transformer.py b/src/RestrictedPython/transformer.py
index c030bb7..7934761 100644
--- a/src/RestrictedPython/transformer.py
+++ b/src/RestrictedPython/transformer.py
@@ -356,7 +356,7 @@ def gen_unpack_wrapper(self, node, target):
         return (tmp_target, cleanup)
 
     def gen_none_node(self):
-        return ast.NameConstant(value=None)
+        return ast.Constant(None)
 
     def gen_del_stmt(self, name_to_del):
         return ast.Delete(targets=[ast.Name(name_to_del, ast.Del())])
diff --git a/tests/transformer/test_gen.py b/tests/transformer/test_gen.py
new file mode 100644
index 0000000..9165d2a
--- /dev/null
+++ b/tests/transformer/test_gen.py
@@ -0,0 +1,9 @@
+import ast
+
+from RestrictedPython.transformer import RestrictingNodeTransformer
+
+
+def test_RestrictingNodeTransformer__gen_none_node__1():
+    node = RestrictingNodeTransformer().gen_none_node()
+    assert node.value is None
+    assert isinstance(node, ast.Constant)