1 files changed, 1 insertions, 0 deletions
diff --git a/win32/win32.c b/win32/win32.c
index 5dafc0320f..7a7078335f 100644
--- a/win32/win32.c
+++ b/win32/win32.c
@@ -3421,6 +3421,7 @@ rb_w32_close(int fd)
 	UnlockFile((HANDLE)sock, 0, 0, LK_LEN, LK_LEN);
 	return _close(fd);
     }
+    _set_osfhnd(fd, (SOCKET)INVALID_HANDLE_VALUE);
     if (closesocket(sock) == SOCKET_ERROR) {
 	errno = map_errno(WSAGetLastError());
 	return -1;