diff --git a/odoo-stubs/tools/pycompat.pyi b/odoo-stubs/tools/pycompat.pyi
index 9483c03..7379288 100644
--- a/odoo-stubs/tools/pycompat.pyi
+++ b/odoo-stubs/tools/pycompat.pyi
@@ -1,8 +1,26 @@
-from typing import Any
+from codecs import StreamReader, StreamWriter
+from csv import Dialect
+from typing import BinaryIO, Iterable, Iterator, Protocol
 
-_reader: Any
-_writer: Any
+class _StreamReader(Protocol):
+    def __call__(self, stream: BinaryIO, errors: str = ...) -> StreamReader: ...
 
-def csv_reader(stream, **params): ...
-def csv_writer(stream, **params): ...
-def to_text(source): ...
+class _StreamWriter(Protocol):
+    def __call__(self, stream: BinaryIO, errors: str = ...) -> StreamWriter: ...
+
+class _CsvReader(Iterator[list[str]]):
+    dialect: Dialect
+    line_num: int
+    def __next__(self) -> list[str]: ...
+
+class _CsvWriter:
+    dialect: Dialect
+    def writerow(self, row: Iterable): ...
+    def writerows(self, rows: Iterable[Iterable]) -> None: ...
+
+_reader: _StreamReader
+_writer: _StreamWriter
+
+def csv_reader(stream: BinaryIO, **params) -> _CsvReader: ...
+def csv_writer(stream: BinaryIO, **params) -> _CsvWriter: ...
+def to_text(source) -> str: ...