diff --git a/src/python/python_py_ext.pyi b/src/python/python_py_ext.pyi
index 068a44a..3003107 100644
--- a/src/python/python_py_ext.pyi
+++ b/src/python/python_py_ext.pyi
@@ -1,6 +1,8 @@
 # Copyright (c) Meta Platforms, Inc. and affiliates.
 # All rights reserved.
 
+# pyre-unsafe
+
 # This source code is licensed under the license found in the
 # LICENSE file in the root directory of this source tree.