diff --git a/stdlib/3/asyncio/streams.pyi b/stdlib/3/asyncio/streams.pyi
index b691798ab..e1dd9e111 100644
--- a/stdlib/3/asyncio/streams.pyi
+++ b/stdlib/3/asyncio/streams.pyi
@@ -1,5 +1,5 @@
 import sys
-from typing import Any, Awaitable, Callable, Iterable, Optional, Tuple, Union
+from typing import Any, AsyncIterator, Awaitable, Callable, Iterable, Optional, Tuple, Union
 
 from . import events
 from . import protocols
@@ -106,3 +106,5 @@ class StreamReader:
     async def readuntil(self, separator: bytes = ...) -> bytes: ...
     async def read(self, n: int = ...) -> bytes: ...
     async def readexactly(self, n: int) -> bytes: ...
+    def __aiter__(self) -> AsyncIterator[bytes]: ...
+    async def __anext__(self) -> bytes: ...