diff --git a/stdlib/ctypes/__init__.pyi b/stdlib/ctypes/__init__.pyi
index 88a9567e1..f257769f5 100644
--- a/stdlib/ctypes/__init__.pyi
+++ b/stdlib/ctypes/__init__.pyi
@@ -165,8 +165,8 @@ def get_errno() -> int: ...
 if sys.platform == "win32":
     def get_last_error() -> int: ...
 
-def memmove(dst: _CVoidPLike, src: _CVoidConstPLike, count: int) -> None: ...
-def memset(dst: _CVoidPLike, c: int, count: int) -> None: ...
+def memmove(dst: _CVoidPLike, src: _CVoidConstPLike, count: int) -> int: ...
+def memset(dst: _CVoidPLike, c: int, count: int) -> int: ...
 def POINTER(type: type[_CT]) -> type[pointer[_CT]]: ...
 
 # The real ctypes.pointer is a function, not a class. The stub version of pointer behaves like