diff --git a/stdlib/3/_curses.pyi b/stdlib/3/_curses.pyi
index 8f1ffff21..368dda208 100644
--- a/stdlib/3/_curses.pyi
+++ b/stdlib/3/_curses.pyi
@@ -2,7 +2,9 @@
 #
 # NOTE: This dynamically typed stub was automatically generated by stubgen.
 
-from typing import Any
+from typing import Any, BinaryIO, Tuple, Union
+
+chtype = Union[str, bytes, int]
 
 ALL_MOUSE_EVENTS = ...  # type: int
 A_ALTCHARSET = ...  # type: int
@@ -217,79 +219,79 @@ REPORT_MOUSE_POSITION = ...  # type: int
 _C_API = ...  # type: Any
 version = ...  # type: bytes
 
-def baudrate(*args, **kwargs): ...
-def beep(*args, **kwargs): ...
-def can_change_color(*args, **kwargs): ...
-def cbreak(*args, **kwargs): ...
-def color_content(*args, **kwargs): ...
-def color_pair(*args, **kwargs): ...
-def curs_set(*args, **kwargs): ...
-def def_prog_mode(*args, **kwargs): ...
-def def_shell_mode(*args, **kwargs): ...
-def delay_output(*args, **kwargs): ...
-def doupdate(*args, **kwargs): ...
-def echo(*args, **kwargs): ...
-def endwin(*args, **kwargs): ...
-def erasechar(*args, **kwargs): ...
-def filter(*args, **kwargs): ...
-def flash(*args, **kwargs): ...
-def flushinp(*args, **kwargs): ...
-def getmouse(*args, **kwargs): ...
-def getsyx(*args, **kwargs): ...
-def getwin(*args, **kwargs): ...
-def halfdelay(*args, **kwargs): ...
-def has_colors(*args, **kwargs): ...
-def has_ic(*args, **kwargs): ...
-def has_il(*args, **kwargs): ...
-def has_key(*args, **kwargs): ...
-def init_color(*args, **kwargs): ...
-def init_pair(*args, **kwargs): ...
-def initscr(*args, **kwargs): ...
-def intrflush(*args, **kwargs): ...
-def is_term_resized(*args, **kwargs): ...
-def isendwin(*args, **kwargs): ...
-def keyname(*args, **kwargs): ...
-def killchar(*args, **kwargs): ...
-def longname(*args, **kwargs): ...
-def meta(*args, **kwargs): ...
-def mouseinterval(*args, **kwargs): ...
-def mousemask(*args, **kwargs): ...
-def napms(*args, **kwargs): ...
-def newpad(*args, **kwargs): ...
-def newwin(*args, **kwargs): ...
-def nl(*args, **kwargs): ...
-def nocbreak(*args, **kwargs): ...
-def noecho(*args, **kwargs): ...
-def nonl(*args, **kwargs): ...
-def noqiflush(*args, **kwargs): ...
-def noraw(*args, **kwargs): ...
-def pair_content(*args, **kwargs): ...
-def pair_number(*args, **kwargs): ...
-def putp(*args, **kwargs): ...
-def qiflush(*args, **kwargs): ...
-def raw(*args, **kwargs): ...
-def reset_prog_mode(*args, **kwargs): ...
-def reset_shell_mode(*args, **kwargs): ...
-def resetty(*args, **kwargs): ...
-def resize_term(*args, **kwargs): ...
-def resizeterm(*args, **kwargs): ...
-def savetty(*args, **kwargs): ...
-def setsyx(*args, **kwargs): ...
-def setupterm(*args, **kwargs): ...
-def start_color(*args, **kwargs): ...
-def termattrs(*args, **kwargs): ...
-def termname(*args, **kwargs): ...
-def tigetflag(*args, **kwargs): ...
-def tigetnum(*args, **kwargs): ...
-def tigetstr(*args, **kwargs): ...
-def tparm(*args, **kwargs): ...
-def typeahead(*args, **kwargs): ...
-def unctrl(*args, **kwargs): ...
-def unget_wch(*args, **kwargs): ...
-def ungetch(*args, **kwargs): ...
-def ungetmouse(*args, **kwargs): ...
-def update_lines_cols(*args, **kwargs): ...
-def use_default_colors(*args, **kwargs): ...
-def use_env(*args, **kwargs): ...
+def baudrate() -> int: ...
+def beep() -> None: ...
+def can_change_color() -> bool: ...
+def cbreak(flag: bool = ...) -> None: ...
+def color_content(color_number: int) -> Tuple[int, int, int]: ...
+def color_pair(color_number: int) -> int: ...
+def curs_set(visibility: int) -> int: ...
+def def_prog_mode() -> None: ...
+def def_shell_mode() -> None: ...
+def delay_output(ms: int) -> None: ...
+def doupdate() -> None: ...
+def echo(flag: bool = ...) -> None: ...
+def endwin() -> None: ...
+def erasechar() -> bytes: ...
+def filter() -> None: ...
+def flash() -> None: ...
+def flushinp() -> None: ...
+def getmouse() -> Tuple[int, int, int, int, int]: ...
+def getsyx() -> Tuple[int, int]: ...
+def getwin(f: BinaryIO): ...
+def halfdelay(tenths: int) -> None: ...
+def has_colors() -> bool: ...
+def has_ic() -> bool: ...
+def has_il() -> bool: ...
+def has_key(ch: int) -> bool: ...
+def init_color(color_number: int, r: int, g: int, b: int) -> None: ...
+def init_pair(pair_number: int, fg: int, bg: int) -> None: ...
+def initscr(): ...
+def intrflush(ch: bool) -> None: ...
+def is_term_resized(nlines: int, ncols: int) -> bool: ...
+def isendwin() -> bool: ...
+def keyname(k: int) -> bytes: ...
+def killchar() -> bytes: ...
+def longname() -> bytes: ...
+def meta(yes: bool) -> None: ...
+def mouseinterval(interval: int) -> None: ...
+def mousemask(mousemask: int) -> Tuple[int, int]: ...
+def napms(ms: int) -> int: ...
+def newpad(nlines: int, ncols: int): ...
+def newwin(nlines: int, ncols: int, begin_y: int = ..., begin_x: int = ...): ...
+def nl(flag: bool = ...) -> None: ...
+def nocbreak() -> None: ...
+def noecho() -> None: ...
+def nonl() -> None: ...
+def noqiflush() -> None: ...
+def noraw() -> None: ...
+def pair_content(pair_number: int) -> Tuple[int, int]: ...
+def pair_number(attr: int) -> int: ...
+def putp(string: bytes) -> None: ...
+def qiflush(flag: bool = ...) -> None: ...
+def raw(flag: bool = ...) -> None: ...
+def reset_prog_mode() -> None: ...
+def reset_shell_mode() -> None: ...
+def resetty() -> None: ...
+def resize_term(nlines: int, ncols: int) -> None: ...
+def resizeterm(nlines: int, ncols: int) -> None: ...
+def savetty() -> None: ...
+def setsyx(y: int, x: int) -> None: ...
+def setupterm(termstr: str = ..., fd: int = ...) -> None: ...
+def start_color() -> None: ...
+def termattrs() -> int: ...
+def termname() -> bytes: ...
+def tigetflag(capname: str) -> int: ...
+def tigetnum(capname: str) -> int: ...
+def tigetstr(capname: str) -> bytes: ...
+def tparm(fmt: str, i1: int = ..., i2: int = ..., i3: int = ..., i4: int = ..., i5: int = ..., i6: int = ..., i7: int = ..., i8: int = ..., i9: int = ...) -> str: ...
+def typeahead(fd: int) -> None: ...
+def unctrl(ch: chtype) -> bytes: ...
+def unget_wch(ch: chtype) -> None: ...
+def ungetch(ch: chtype) -> None: ...
+def ungetmouse(id: int, x: int, y: int, z: int, bstate: int) -> None: ...
+def update_lines_cols() -> int: ...
+def use_default_colors() -> None: ...
+def use_env(flag: bool) -> None: ...
 
 class error(Exception): ...