diff --git a/stdlib/3/asyncio/subprocess.pyi b/stdlib/3/asyncio/subprocess.pyi
index 6bb50ad97..d968a156c 100644
--- a/stdlib/3/asyncio/subprocess.pyi
+++ b/stdlib/3/asyncio/subprocess.pyi
@@ -30,7 +30,7 @@ class Process:
                  protocol: protocols.BaseProtocol,
                  loop: events.AbstractEventLoop) -> None: ...
     @property
-    def returncode(self) -> int: ...
+    def returncode(self) -> Optional[int]: ...
     async def wait(self) -> int: ...
     def send_signal(self, signal: int) -> None: ...
     def terminate(self) -> None: ...