diff --git a/stubs/protobuf/google/protobuf/internal/api_implementation.pyi b/stubs/protobuf/google/protobuf/internal/api_implementation.pyi
new file mode 100644
index 000000000..4940124ff
--- /dev/null
+++ b/stubs/protobuf/google/protobuf/internal/api_implementation.pyi
@@ -0,0 +1,3 @@
+def Type() -> str: ...
+def Version() -> int: ...
+def IsPythonDefaultSerializationDeterministic() -> bool: ...