diff --git a/stdlib/2and3/asyncore.pyi b/stdlib/2and3/asyncore.pyi
index b93bd6c58..3045e6f19 100644
--- a/stdlib/2and3/asyncore.pyi
+++ b/stdlib/2and3/asyncore.pyi
@@ -1,18 +1,10 @@
-from typing import Tuple, Union, Optional, Any, Dict, overload
+from typing import Tuple, Union, Any, Dict, overload
 
-import os
-import select
 import sys
-import time
-import warnings
 from socket import SocketType
 from typing import Optional
 from _types import FileDescriptorLike
 
-from errno import (EALREADY, EINPROGRESS, EWOULDBLOCK, ECONNRESET, EINVAL,
-                   ENOTCONN, ESHUTDOWN, EINTR, EISCONN, EBADF, ECONNABORTED,
-                   EPIPE, EAGAIN, errorcode)
-
 # cyclic dependence with asynchat
 _maptype = Dict[int, Any]
 
@@ -121,26 +113,25 @@ class dispatcher_with_send(dispatcher):
 def compact_traceback() -> Tuple[Tuple[str, str, str], type, type, str]: ...
 def close_all(map: Optional[_maptype] = ..., ignore_all: bool = ...) -> None: ...
 
-# if os.name == 'posix':
-#    import fcntl
-class file_wrapper:
-    fd: int
+if sys.platform != "win32":
+    class file_wrapper:
+        fd: int
 
-    def __init__(self, fd: int) -> None: ...
-    def recv(self, bufsize: int, flags: int = ...) -> bytes: ...
-    def send(self, data: bytes, flags: int = ...) -> int: ...
+        def __init__(self, fd: int) -> None: ...
+        def recv(self, bufsize: int, flags: int = ...) -> bytes: ...
+        def send(self, data: bytes, flags: int = ...) -> int: ...
 
-    @overload
-    def getsockopt(self, level: int, optname: int, buflen: None = ...) -> int: ...
-    @overload
-    def getsockopt(self, level: int, optname: int, buflen: int) -> bytes: ...
+        @overload
+        def getsockopt(self, level: int, optname: int, buflen: None = ...) -> int: ...
+        @overload
+        def getsockopt(self, level: int, optname: int, buflen: int) -> bytes: ...
 
-    def read(self, bufsize: int, flags: int = ...) -> bytes: ...
-    def write(self, data: bytes, flags: int = ...) -> int: ...
+        def read(self, bufsize: int, flags: int = ...) -> bytes: ...
+        def write(self, data: bytes, flags: int = ...) -> int: ...
 
-    def close(self) -> None: ...
-    def fileno(self) -> int: ...
+        def close(self) -> None: ...
+        def fileno(self) -> int: ...
 
-class file_dispatcher(dispatcher):
-    def __init__(self, fd: FileDescriptorLike, map: Optional[_maptype] = ...) -> None: ...
-    def set_file(self, fd: int) -> None: ...
+    class file_dispatcher(dispatcher):
+        def __init__(self, fd: FileDescriptorLike, map: Optional[_maptype] = ...) -> None: ...
+        def set_file(self, fd: int) -> None: ...