diff --git a/kitty/fast_data_types.pyi b/kitty/fast_data_types.pyi
index 371ee122f..1e2c0cb6b 100644
--- a/kitty/fast_data_types.pyi
+++ b/kitty/fast_data_types.pyi
@@ -1860,3 +1860,4 @@ def request_callback_with_thumbnail(
         scale: float = 0.25, max_width: int = 480
 ) -> None: ...
 def png_from_32bit_rgba_data(data: bytes, width: int, height: int, flip_vertically: bool = False) -> bytes: ...
+def set_uint_at_address(address: int, value: int) -> None: ...