diff --git a/stdlib/asyncio/transports.pyi b/stdlib/asyncio/transports.pyi
index a8cd753c2..f1a81e14f 100644
--- a/stdlib/asyncio/transports.pyi
+++ b/stdlib/asyncio/transports.pyi
@@ -53,4 +53,6 @@ class SubprocessTransport(BaseTransport):
 
 class _FlowControlMixin(Transport):
     def __init__(self, extra: Mapping[Any, Any] | None = ..., loop: AbstractEventLoop | None = ...) -> None: ...
+    def set_write_buffer_limits(self, high: int | None = ..., low: int | None = ...) -> None: ...
+    def get_write_buffer_size(self) -> int: ...
     def get_write_buffer_limits(self) -> tuple[int, int]: ...