diff --git a/stdlib/termios.pyi b/stdlib/termios.pyi
index c4da38417..7142df157 100644
--- a/stdlib/termios.pyi
+++ b/stdlib/termios.pyi
@@ -1,246 +1,246 @@
+import sys
 from _typeshed import FileDescriptorLike
 from typing import Any, Union
 
-_Attr = list[Union[int, list[Union[bytes, int]]]]
+if sys.platform != "win32":
+    _Attr = list[Union[int, list[Union[bytes, int]]]]
 
-# TODO constants not really documented
-B0: int
-B1000000: int
-B110: int
-B115200: int
-B1152000: int
-B1200: int
-B134: int
-B150: int
-B1500000: int
-B1800: int
-B19200: int
-B200: int
-B2000000: int
-B230400: int
-B2400: int
-B2500000: int
-B300: int
-B3000000: int
-B3500000: int
-B38400: int
-B4000000: int
-B460800: int
-B4800: int
-B50: int
-B500000: int
-B57600: int
-B576000: int
-B600: int
-B75: int
-B921600: int
-B9600: int
-BRKINT: int
-BS0: int
-BS1: int
-BSDLY: int
-CBAUD: int
-CBAUDEX: int
-CDSUSP: int
-CEOF: int
-CEOL: int
-CEOT: int
-CERASE: int
-CFLUSH: int
-CIBAUD: int
-CINTR: int
-CKILL: int
-CLNEXT: int
-CLOCAL: int
-CQUIT: int
-CR0: int
-CR1: int
-CR2: int
-CR3: int
-CRDLY: int
-CREAD: int
-CRPRNT: int
-CRTSCTS: int
-CS5: int
-CS6: int
-CS7: int
-CS8: int
-CSIZE: int
-CSTART: int
-CSTOP: int
-CSTOPB: int
-CSUSP: int
-CWERASE: int
-ECHO: int
-ECHOCTL: int
-ECHOE: int
-ECHOK: int
-ECHOKE: int
-ECHONL: int
-ECHOPRT: int
-EXTA: int
-EXTB: int
-FF0: int
-FF1: int
-FFDLY: int
-FIOASYNC: int
-FIOCLEX: int
-FIONBIO: int
-FIONCLEX: int
-FIONREAD: int
-FLUSHO: int
-HUPCL: int
-ICANON: int
-ICRNL: int
-IEXTEN: int
-IGNBRK: int
-IGNCR: int
-IGNPAR: int
-IMAXBEL: int
-INLCR: int
-INPCK: int
-IOCSIZE_MASK: int
-IOCSIZE_SHIFT: int
-ISIG: int
-ISTRIP: int
-IUCLC: int
-IXANY: int
-IXOFF: int
-IXON: int
-NCC: int
-NCCS: int
-NL0: int
-NL1: int
-NLDLY: int
-NOFLSH: int
-N_MOUSE: int
-N_PPP: int
-N_SLIP: int
-N_STRIP: int
-N_TTY: int
-OCRNL: int
-OFDEL: int
-OFILL: int
-OLCUC: int
-ONLCR: int
-ONLRET: int
-ONOCR: int
-OPOST: int
-PARENB: int
-PARMRK: int
-PARODD: int
-PENDIN: int
-TAB0: int
-TAB1: int
-TAB2: int
-TAB3: int
-TABDLY: int
-TCFLSH: int
-TCGETA: int
-TCGETS: int
-TCIFLUSH: int
-TCIOFF: int
-TCIOFLUSH: int
-TCION: int
-TCOFLUSH: int
-TCOOFF: int
-TCOON: int
-TCSADRAIN: int
-TCSAFLUSH: int
-TCSANOW: int
-TCSBRK: int
-TCSBRKP: int
-TCSETA: int
-TCSETAF: int
-TCSETAW: int
-TCSETS: int
-TCSETSF: int
-TCSETSW: int
-TCXONC: int
-TIOCCONS: int
-TIOCEXCL: int
-TIOCGETD: int
-TIOCGICOUNT: int
-TIOCGLCKTRMIOS: int
-TIOCGPGRP: int
-TIOCGSERIAL: int
-TIOCGSOFTCAR: int
-TIOCGWINSZ: int
-TIOCINQ: int
-TIOCLINUX: int
-TIOCMBIC: int
-TIOCMBIS: int
-TIOCMGET: int
-TIOCMIWAIT: int
-TIOCMSET: int
-TIOCM_CAR: int
-TIOCM_CD: int
-TIOCM_CTS: int
-TIOCM_DSR: int
-TIOCM_DTR: int
-TIOCM_LE: int
-TIOCM_RI: int
-TIOCM_RNG: int
-TIOCM_RTS: int
-TIOCM_SR: int
-TIOCM_ST: int
-TIOCNOTTY: int
-TIOCNXCL: int
-TIOCOUTQ: int
-TIOCPKT: int
-TIOCPKT_DATA: int
-TIOCPKT_DOSTOP: int
-TIOCPKT_FLUSHREAD: int
-TIOCPKT_FLUSHWRITE: int
-TIOCPKT_NOSTOP: int
-TIOCPKT_START: int
-TIOCPKT_STOP: int
-TIOCSCTTY: int
-TIOCSERCONFIG: int
-TIOCSERGETLSR: int
-TIOCSERGETMULTI: int
-TIOCSERGSTRUCT: int
-TIOCSERGWILD: int
-TIOCSERSETMULTI: int
-TIOCSERSWILD: int
-TIOCSER_TEMT: int
-TIOCSETD: int
-TIOCSLCKTRMIOS: int
-TIOCSPGRP: int
-TIOCSSERIAL: int
-TIOCSSOFTCAR: int
-TIOCSTI: int
-TIOCSWINSZ: int
-TOSTOP: int
-VDISCARD: int
-VEOF: int
-VEOL: int
-VEOL2: int
-VERASE: int
-VINTR: int
-VKILL: int
-VLNEXT: int
-VMIN: int
-VQUIT: int
-VREPRINT: int
-VSTART: int
-VSTOP: int
-VSUSP: int
-VSWTC: int
-VSWTCH: int
-VT0: int
-VT1: int
-VTDLY: int
-VTIME: int
-VWERASE: int
-XCASE: int
-XTABS: int
-
-def tcgetattr(__fd: FileDescriptorLike) -> list[Any]: ...
-def tcsetattr(__fd: FileDescriptorLike, __when: int, __attributes: _Attr) -> None: ...
-def tcsendbreak(__fd: FileDescriptorLike, __duration: int) -> None: ...
-def tcdrain(__fd: FileDescriptorLike) -> None: ...
-def tcflush(__fd: FileDescriptorLike, __queue: int) -> None: ...
-def tcflow(__fd: FileDescriptorLike, __action: int) -> None: ...
-
-class error(Exception): ...
+    # TODO constants not really documented
+    B0: int
+    B1000000: int
+    B110: int
+    B115200: int
+    B1152000: int
+    B1200: int
+    B134: int
+    B150: int
+    B1500000: int
+    B1800: int
+    B19200: int
+    B200: int
+    B2000000: int
+    B230400: int
+    B2400: int
+    B2500000: int
+    B300: int
+    B3000000: int
+    B3500000: int
+    B38400: int
+    B4000000: int
+    B460800: int
+    B4800: int
+    B50: int
+    B500000: int
+    B57600: int
+    B576000: int
+    B600: int
+    B75: int
+    B921600: int
+    B9600: int
+    BRKINT: int
+    BS0: int
+    BS1: int
+    BSDLY: int
+    CBAUD: int
+    CBAUDEX: int
+    CDSUSP: int
+    CEOF: int
+    CEOL: int
+    CEOT: int
+    CERASE: int
+    CFLUSH: int
+    CIBAUD: int
+    CINTR: int
+    CKILL: int
+    CLNEXT: int
+    CLOCAL: int
+    CQUIT: int
+    CR0: int
+    CR1: int
+    CR2: int
+    CR3: int
+    CRDLY: int
+    CREAD: int
+    CRPRNT: int
+    CRTSCTS: int
+    CS5: int
+    CS6: int
+    CS7: int
+    CS8: int
+    CSIZE: int
+    CSTART: int
+    CSTOP: int
+    CSTOPB: int
+    CSUSP: int
+    CWERASE: int
+    ECHO: int
+    ECHOCTL: int
+    ECHOE: int
+    ECHOK: int
+    ECHOKE: int
+    ECHONL: int
+    ECHOPRT: int
+    EXTA: int
+    EXTB: int
+    FF0: int
+    FF1: int
+    FFDLY: int
+    FIOASYNC: int
+    FIOCLEX: int
+    FIONBIO: int
+    FIONCLEX: int
+    FIONREAD: int
+    FLUSHO: int
+    HUPCL: int
+    ICANON: int
+    ICRNL: int
+    IEXTEN: int
+    IGNBRK: int
+    IGNCR: int
+    IGNPAR: int
+    IMAXBEL: int
+    INLCR: int
+    INPCK: int
+    IOCSIZE_MASK: int
+    IOCSIZE_SHIFT: int
+    ISIG: int
+    ISTRIP: int
+    IUCLC: int
+    IXANY: int
+    IXOFF: int
+    IXON: int
+    NCC: int
+    NCCS: int
+    NL0: int
+    NL1: int
+    NLDLY: int
+    NOFLSH: int
+    N_MOUSE: int
+    N_PPP: int
+    N_SLIP: int
+    N_STRIP: int
+    N_TTY: int
+    OCRNL: int
+    OFDEL: int
+    OFILL: int
+    OLCUC: int
+    ONLCR: int
+    ONLRET: int
+    ONOCR: int
+    OPOST: int
+    PARENB: int
+    PARMRK: int
+    PARODD: int
+    PENDIN: int
+    TAB0: int
+    TAB1: int
+    TAB2: int
+    TAB3: int
+    TABDLY: int
+    TCFLSH: int
+    TCGETA: int
+    TCGETS: int
+    TCIFLUSH: int
+    TCIOFF: int
+    TCIOFLUSH: int
+    TCION: int
+    TCOFLUSH: int
+    TCOOFF: int
+    TCOON: int
+    TCSADRAIN: int
+    TCSAFLUSH: int
+    TCSANOW: int
+    TCSBRK: int
+    TCSBRKP: int
+    TCSETA: int
+    TCSETAF: int
+    TCSETAW: int
+    TCSETS: int
+    TCSETSF: int
+    TCSETSW: int
+    TCXONC: int
+    TIOCCONS: int
+    TIOCEXCL: int
+    TIOCGETD: int
+    TIOCGICOUNT: int
+    TIOCGLCKTRMIOS: int
+    TIOCGPGRP: int
+    TIOCGSERIAL: int
+    TIOCGSOFTCAR: int
+    TIOCGWINSZ: int
+    TIOCINQ: int
+    TIOCLINUX: int
+    TIOCMBIC: int
+    TIOCMBIS: int
+    TIOCMGET: int
+    TIOCMIWAIT: int
+    TIOCMSET: int
+    TIOCM_CAR: int
+    TIOCM_CD: int
+    TIOCM_CTS: int
+    TIOCM_DSR: int
+    TIOCM_DTR: int
+    TIOCM_LE: int
+    TIOCM_RI: int
+    TIOCM_RNG: int
+    TIOCM_RTS: int
+    TIOCM_SR: int
+    TIOCM_ST: int
+    TIOCNOTTY: int
+    TIOCNXCL: int
+    TIOCOUTQ: int
+    TIOCPKT: int
+    TIOCPKT_DATA: int
+    TIOCPKT_DOSTOP: int
+    TIOCPKT_FLUSHREAD: int
+    TIOCPKT_FLUSHWRITE: int
+    TIOCPKT_NOSTOP: int
+    TIOCPKT_START: int
+    TIOCPKT_STOP: int
+    TIOCSCTTY: int
+    TIOCSERCONFIG: int
+    TIOCSERGETLSR: int
+    TIOCSERGETMULTI: int
+    TIOCSERGSTRUCT: int
+    TIOCSERGWILD: int
+    TIOCSERSETMULTI: int
+    TIOCSERSWILD: int
+    TIOCSER_TEMT: int
+    TIOCSETD: int
+    TIOCSLCKTRMIOS: int
+    TIOCSPGRP: int
+    TIOCSSERIAL: int
+    TIOCSSOFTCAR: int
+    TIOCSTI: int
+    TIOCSWINSZ: int
+    TOSTOP: int
+    VDISCARD: int
+    VEOF: int
+    VEOL: int
+    VEOL2: int
+    VERASE: int
+    VINTR: int
+    VKILL: int
+    VLNEXT: int
+    VMIN: int
+    VQUIT: int
+    VREPRINT: int
+    VSTART: int
+    VSTOP: int
+    VSUSP: int
+    VSWTC: int
+    VSWTCH: int
+    VT0: int
+    VT1: int
+    VTDLY: int
+    VTIME: int
+    VWERASE: int
+    XCASE: int
+    XTABS: int
+    def tcgetattr(__fd: FileDescriptorLike) -> list[Any]: ...
+    def tcsetattr(__fd: FileDescriptorLike, __when: int, __attributes: _Attr) -> None: ...
+    def tcsendbreak(__fd: FileDescriptorLike, __duration: int) -> None: ...
+    def tcdrain(__fd: FileDescriptorLike) -> None: ...
+    def tcflush(__fd: FileDescriptorLike, __queue: int) -> None: ...
+    def tcflow(__fd: FileDescriptorLike, __action: int) -> None: ...
+    class error(Exception): ...