diff --git a/stdlib/termios.pyi b/stdlib/termios.pyi
index 5a5a1f53b..a35be5dfe 100644
--- a/stdlib/termios.pyi
+++ b/stdlib/termios.pyi
@@ -1,6 +1,6 @@
 import sys
 from _typeshed import FileDescriptorLike
-from typing import Any
+from typing import Any, Final
 from typing_extensions import TypeAlias
 
 # Must be a list of length 7, containing 6 ints and a list of NCCS 1-character bytes or ints.
@@ -9,286 +9,287 @@ _Attr: TypeAlias = list[int | list[bytes | int]] | list[int | list[bytes]] | lis
 _AttrReturn: TypeAlias = list[Any]
 
 if sys.platform != "win32":
-    B0: int
-    B110: int
-    B115200: int
-    B1200: int
-    B134: int
-    B150: int
-    B1800: int
-    B19200: int
-    B200: int
-    B230400: int
-    B2400: int
-    B300: int
-    B38400: int
-    B4800: int
-    B50: int
-    B57600: int
-    B600: int
-    B75: int
-    B9600: int
-    BRKINT: int
-    BS0: int
-    BS1: int
-    BSDLY: int
-    CDSUSP: int
-    CEOF: int
-    CEOL: int
-    CEOT: int
-    CERASE: int
-    CFLUSH: 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
-    ISIG: int
-    ISTRIP: int
-    IXANY: int
-    IXOFF: int
-    IXON: int
-    NCCS: int
-    NL0: int
-    NL1: int
-    NLDLY: int
-    NOFLSH: int
-    OCRNL: int
-    OFDEL: int
-    OFILL: 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
-    TCIFLUSH: int
-    TCIOFF: int
-    TCIOFLUSH: int
-    TCION: int
-    TCOFLUSH: int
-    TCOOFF: int
-    TCOON: int
-    TCSADRAIN: int
-    TCSAFLUSH: int
-    TCSANOW: int
-    TIOCCONS: int
-    TIOCEXCL: int
-    TIOCGETD: int
-    TIOCGPGRP: int
-    TIOCGWINSZ: 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
-    TIOCMBIC: int
-    TIOCMBIS: int
-    TIOCMGET: int
-    TIOCMSET: int
-    TIOCNOTTY: int
-    TIOCNXCL: int
-    TIOCOUTQ: int
-    TIOCPKT_DATA: int
-    TIOCPKT_DOSTOP: int
-    TIOCPKT_FLUSHREAD: int
-    TIOCPKT_FLUSHWRITE: int
-    TIOCPKT_NOSTOP: int
-    TIOCPKT_START: int
-    TIOCPKT_STOP: int
-    TIOCPKT: int
-    TIOCSCTTY: int
-    TIOCSETD: int
-    TIOCSPGRP: 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
-    VT0: int
-    VT1: int
-    VTDLY: int
-    VTIME: int
-    VWERASE: int
+    # Values depends on the platform
+    B0: Final[int]
+    B110: Final[int]
+    B115200: Final[int]
+    B1200: Final[int]
+    B134: Final[int]
+    B150: Final[int]
+    B1800: Final[int]
+    B19200: Final[int]
+    B200: Final[int]
+    B230400: Final[int]
+    B2400: Final[int]
+    B300: Final[int]
+    B38400: Final[int]
+    B4800: Final[int]
+    B50: Final[int]
+    B57600: Final[int]
+    B600: Final[int]
+    B75: Final[int]
+    B9600: Final[int]
+    BRKINT: Final[int]
+    BS0: Final[int]
+    BS1: Final[int]
+    BSDLY: Final[int]
+    CDSUSP: Final[int]
+    CEOF: Final[int]
+    CEOL: Final[int]
+    CEOT: Final[int]
+    CERASE: Final[int]
+    CFLUSH: Final[int]
+    CINTR: Final[int]
+    CKILL: Final[int]
+    CLNEXT: Final[int]
+    CLOCAL: Final[int]
+    CQUIT: Final[int]
+    CR0: Final[int]
+    CR1: Final[int]
+    CR2: Final[int]
+    CR3: Final[int]
+    CRDLY: Final[int]
+    CREAD: Final[int]
+    CRPRNT: Final[int]
+    CRTSCTS: Final[int]
+    CS5: Final[int]
+    CS6: Final[int]
+    CS7: Final[int]
+    CS8: Final[int]
+    CSIZE: Final[int]
+    CSTART: Final[int]
+    CSTOP: Final[int]
+    CSTOPB: Final[int]
+    CSUSP: Final[int]
+    CWERASE: Final[int]
+    ECHO: Final[int]
+    ECHOCTL: Final[int]
+    ECHOE: Final[int]
+    ECHOK: Final[int]
+    ECHOKE: Final[int]
+    ECHONL: Final[int]
+    ECHOPRT: Final[int]
+    EXTA: Final[int]
+    EXTB: Final[int]
+    FF0: Final[int]
+    FF1: Final[int]
+    FFDLY: Final[int]
+    FIOASYNC: Final[int]
+    FIOCLEX: Final[int]
+    FIONBIO: Final[int]
+    FIONCLEX: Final[int]
+    FIONREAD: Final[int]
+    FLUSHO: Final[int]
+    HUPCL: Final[int]
+    ICANON: Final[int]
+    ICRNL: Final[int]
+    IEXTEN: Final[int]
+    IGNBRK: Final[int]
+    IGNCR: Final[int]
+    IGNPAR: Final[int]
+    IMAXBEL: Final[int]
+    INLCR: Final[int]
+    INPCK: Final[int]
+    ISIG: Final[int]
+    ISTRIP: Final[int]
+    IXANY: Final[int]
+    IXOFF: Final[int]
+    IXON: Final[int]
+    NCCS: Final[int]
+    NL0: Final[int]
+    NL1: Final[int]
+    NLDLY: Final[int]
+    NOFLSH: Final[int]
+    OCRNL: Final[int]
+    OFDEL: Final[int]
+    OFILL: Final[int]
+    ONLCR: Final[int]
+    ONLRET: Final[int]
+    ONOCR: Final[int]
+    OPOST: Final[int]
+    PARENB: Final[int]
+    PARMRK: Final[int]
+    PARODD: Final[int]
+    PENDIN: Final[int]
+    TAB0: Final[int]
+    TAB1: Final[int]
+    TAB2: Final[int]
+    TAB3: Final[int]
+    TABDLY: Final[int]
+    TCIFLUSH: Final[int]
+    TCIOFF: Final[int]
+    TCIOFLUSH: Final[int]
+    TCION: Final[int]
+    TCOFLUSH: Final[int]
+    TCOOFF: Final[int]
+    TCOON: Final[int]
+    TCSADRAIN: Final[int]
+    TCSAFLUSH: Final[int]
+    TCSANOW: Final[int]
+    TIOCCONS: Final[int]
+    TIOCEXCL: Final[int]
+    TIOCGETD: Final[int]
+    TIOCGPGRP: Final[int]
+    TIOCGWINSZ: Final[int]
+    TIOCM_CAR: Final[int]
+    TIOCM_CD: Final[int]
+    TIOCM_CTS: Final[int]
+    TIOCM_DSR: Final[int]
+    TIOCM_DTR: Final[int]
+    TIOCM_LE: Final[int]
+    TIOCM_RI: Final[int]
+    TIOCM_RNG: Final[int]
+    TIOCM_RTS: Final[int]
+    TIOCM_SR: Final[int]
+    TIOCM_ST: Final[int]
+    TIOCMBIC: Final[int]
+    TIOCMBIS: Final[int]
+    TIOCMGET: Final[int]
+    TIOCMSET: Final[int]
+    TIOCNOTTY: Final[int]
+    TIOCNXCL: Final[int]
+    TIOCOUTQ: Final[int]
+    TIOCPKT_DATA: Final[int]
+    TIOCPKT_DOSTOP: Final[int]
+    TIOCPKT_FLUSHREAD: Final[int]
+    TIOCPKT_FLUSHWRITE: Final[int]
+    TIOCPKT_NOSTOP: Final[int]
+    TIOCPKT_START: Final[int]
+    TIOCPKT_STOP: Final[int]
+    TIOCPKT: Final[int]
+    TIOCSCTTY: Final[int]
+    TIOCSETD: Final[int]
+    TIOCSPGRP: Final[int]
+    TIOCSTI: Final[int]
+    TIOCSWINSZ: Final[int]
+    TOSTOP: Final[int]
+    VDISCARD: Final[int]
+    VEOF: Final[int]
+    VEOL: Final[int]
+    VEOL2: Final[int]
+    VERASE: Final[int]
+    VINTR: Final[int]
+    VKILL: Final[int]
+    VLNEXT: Final[int]
+    VMIN: Final[int]
+    VQUIT: Final[int]
+    VREPRINT: Final[int]
+    VSTART: Final[int]
+    VSTOP: Final[int]
+    VSUSP: Final[int]
+    VT0: Final[int]
+    VT1: Final[int]
+    VTDLY: Final[int]
+    VTIME: Final[int]
+    VWERASE: Final[int]
 
     if sys.version_info >= (3, 13):
-        EXTPROC: int
-        IUTF8: int
+        EXTPROC: Final[int]
+        IUTF8: Final[int]
 
     if sys.platform == "darwin" and sys.version_info >= (3, 13):
-        ALTWERASE: int
-        B14400: int
-        B28800: int
-        B7200: int
-        B76800: int
-        CCAR_OFLOW: int
-        CCTS_OFLOW: int
-        CDSR_OFLOW: int
-        CDTR_IFLOW: int
-        CIGNORE: int
-        CRTS_IFLOW: int
-        MDMBUF: int
-        NL2: int
-        NL3: int
-        NOKERNINFO: int
-        ONOEOT: int
-        OXTABS: int
-        VDSUSP: int
-        VSTATUS: int
+        ALTWERASE: Final[int]
+        B14400: Final[int]
+        B28800: Final[int]
+        B7200: Final[int]
+        B76800: Final[int]
+        CCAR_OFLOW: Final[int]
+        CCTS_OFLOW: Final[int]
+        CDSR_OFLOW: Final[int]
+        CDTR_IFLOW: Final[int]
+        CIGNORE: Final[int]
+        CRTS_IFLOW: Final[int]
+        MDMBUF: Final[int]
+        NL2: Final[int]
+        NL3: Final[int]
+        NOKERNINFO: Final[int]
+        ONOEOT: Final[int]
+        OXTABS: Final[int]
+        VDSUSP: Final[int]
+        VSTATUS: Final[int]
 
     if sys.platform == "darwin" and sys.version_info >= (3, 11):
-        TIOCGSIZE: int
-        TIOCSSIZE: int
+        TIOCGSIZE: Final[int]
+        TIOCSSIZE: Final[int]
 
     if sys.platform == "linux":
-        B1152000: int
-        B576000: int
-        CBAUD: int
-        CBAUDEX: int
-        CIBAUD: int
-        IOCSIZE_MASK: int
-        IOCSIZE_SHIFT: int
-        IUCLC: int
-        N_MOUSE: int
-        N_PPP: int
-        N_SLIP: int
-        N_STRIP: int
-        N_TTY: int
-        NCC: int
-        OLCUC: int
-        TCFLSH: int
-        TCGETA: int
-        TCGETS: int
-        TCSBRK: int
-        TCSBRKP: int
-        TCSETA: int
-        TCSETAF: int
-        TCSETAW: int
-        TCSETS: int
-        TCSETSF: int
-        TCSETSW: int
-        TCXONC: int
-        TIOCGICOUNT: int
-        TIOCGLCKTRMIOS: int
-        TIOCGSERIAL: int
-        TIOCGSOFTCAR: int
-        TIOCINQ: int
-        TIOCLINUX: int
-        TIOCMIWAIT: int
-        TIOCTTYGSTRUCT: int
-        TIOCSER_TEMT: int
-        TIOCSERCONFIG: int
-        TIOCSERGETLSR: int
-        TIOCSERGETMULTI: int
-        TIOCSERGSTRUCT: int
-        TIOCSERGWILD: int
-        TIOCSERSETMULTI: int
-        TIOCSERSWILD: int
-        TIOCSLCKTRMIOS: int
-        TIOCSSERIAL: int
-        TIOCSSOFTCAR: int
-        VSWTC: int
-        VSWTCH: int
-        XCASE: int
-        XTABS: int
+        B1152000: Final[int]
+        B576000: Final[int]
+        CBAUD: Final[int]
+        CBAUDEX: Final[int]
+        CIBAUD: Final[int]
+        IOCSIZE_MASK: Final[int]
+        IOCSIZE_SHIFT: Final[int]
+        IUCLC: Final[int]
+        N_MOUSE: Final[int]
+        N_PPP: Final[int]
+        N_SLIP: Final[int]
+        N_STRIP: Final[int]
+        N_TTY: Final[int]
+        NCC: Final[int]
+        OLCUC: Final[int]
+        TCFLSH: Final[int]
+        TCGETA: Final[int]
+        TCGETS: Final[int]
+        TCSBRK: Final[int]
+        TCSBRKP: Final[int]
+        TCSETA: Final[int]
+        TCSETAF: Final[int]
+        TCSETAW: Final[int]
+        TCSETS: Final[int]
+        TCSETSF: Final[int]
+        TCSETSW: Final[int]
+        TCXONC: Final[int]
+        TIOCGICOUNT: Final[int]
+        TIOCGLCKTRMIOS: Final[int]
+        TIOCGSERIAL: Final[int]
+        TIOCGSOFTCAR: Final[int]
+        TIOCINQ: Final[int]
+        TIOCLINUX: Final[int]
+        TIOCMIWAIT: Final[int]
+        TIOCTTYGSTRUCT: Final[int]
+        TIOCSER_TEMT: Final[int]
+        TIOCSERCONFIG: Final[int]
+        TIOCSERGETLSR: Final[int]
+        TIOCSERGETMULTI: Final[int]
+        TIOCSERGSTRUCT: Final[int]
+        TIOCSERGWILD: Final[int]
+        TIOCSERSETMULTI: Final[int]
+        TIOCSERSWILD: Final[int]
+        TIOCSLCKTRMIOS: Final[int]
+        TIOCSSERIAL: Final[int]
+        TIOCSSOFTCAR: Final[int]
+        VSWTC: Final[int]
+        VSWTCH: Final[int]
+        XCASE: Final[int]
+        XTABS: Final[int]
 
     if sys.platform != "darwin":
-        B1000000: int
-        B1500000: int
-        B2000000: int
-        B2500000: int
-        B3000000: int
-        B3500000: int
-        B4000000: int
-        B460800: int
-        B500000: int
-        B921600: int
+        B1000000: Final[int]
+        B1500000: Final[int]
+        B2000000: Final[int]
+        B2500000: Final[int]
+        B3000000: Final[int]
+        B3500000: Final[int]
+        B4000000: Final[int]
+        B460800: Final[int]
+        B500000: Final[int]
+        B921600: Final[int]
 
     if sys.platform != "linux":
-        TCSASOFT: int
+        TCSASOFT: Final[int]
 
     if sys.platform != "darwin" and sys.platform != "linux":
         # not available on FreeBSD either.
-        CDEL: int
-        CEOL2: int
-        CESC: int
-        CNUL: int
-        COMMON: int
-        CSWTCH: int
-        IBSHIFT: int
-        INIT_C_CC: int
-        NSWTCH: int
+        CDEL: Final[int]
+        CEOL2: Final[int]
+        CESC: Final[int]
+        CNUL: Final[int]
+        COMMON: Final[int]
+        CSWTCH: Final[int]
+        IBSHIFT: Final[int]
+        INIT_C_CC: Final[int]
+        NSWTCH: Final[int]
 
     def tcgetattr(fd: FileDescriptorLike, /) -> _AttrReturn: ...
     def tcsetattr(fd: FileDescriptorLike, when: int, attributes: _Attr, /) -> None: ...
diff --git a/stdlib/tty.pyi b/stdlib/tty.pyi
index 0611879cf..ca3f0013b 100644
--- a/stdlib/tty.pyi
+++ b/stdlib/tty.pyi
@@ -15,13 +15,13 @@ if sys.platform != "win32":
     _FD: TypeAlias = int | IO[str]
 
     # XXX: Undocumented integer constants
-    IFLAG: Final[int]
-    OFLAG: Final[int]
-    CFLAG: Final[int]
-    LFLAG: Final[int]
-    ISPEED: Final[int]
-    OSPEED: Final[int]
-    CC: Final[int]
+    IFLAG: Final = 0
+    OFLAG: Final = 1
+    CFLAG: Final = 2
+    LFLAG: Final = 3
+    ISPEED: Final = 4
+    OSPEED: Final = 5
+    CC: Final = 6
     def setraw(fd: _FD, when: int = 2) -> _ModeSetterReturn: ...
     def setcbreak(fd: _FD, when: int = 2) -> _ModeSetterReturn: ...