diff --git a/stdlib/2/_winreg.pyi b/stdlib/2/_winreg.pyi
index fa7afed19..4c34f8eaf 100644
--- a/stdlib/2/_winreg.pyi
+++ b/stdlib/2/_winreg.pyi
@@ -22,7 +22,7 @@ def QueryInfoKey(__key: _KeyType) -> Tuple[int, int, int]: ...
 def QueryValue(__key: _KeyType, __sub_key: Optional[str]) -> str: ...
 def QueryValueEx(__key: _KeyType, __name: str) -> Tuple[Any, int]: ...
 def SaveKey(__key: _KeyType, __file_name: str) -> None: ...
-def SetValue(__key: _KeyType, __sub_key: str, __type: int, __value: Union[str, int]) -> None: ...
+def SetValue(__key: _KeyType, __sub_key: str, __type: int, __value: str) -> None: ...
 def SetValueEx(
     __key: _KeyType, __value_name: str, __reserved: Any, __type: int, __value: Union[str, int]
 ) -> None: ...  # reserved is ignored
diff --git a/stdlib/3/winreg.pyi b/stdlib/3/winreg.pyi
index fa7afed19..4c34f8eaf 100644
--- a/stdlib/3/winreg.pyi
+++ b/stdlib/3/winreg.pyi
@@ -22,7 +22,7 @@ def QueryInfoKey(__key: _KeyType) -> Tuple[int, int, int]: ...
 def QueryValue(__key: _KeyType, __sub_key: Optional[str]) -> str: ...
 def QueryValueEx(__key: _KeyType, __name: str) -> Tuple[Any, int]: ...
 def SaveKey(__key: _KeyType, __file_name: str) -> None: ...
-def SetValue(__key: _KeyType, __sub_key: str, __type: int, __value: Union[str, int]) -> None: ...
+def SetValue(__key: _KeyType, __sub_key: str, __type: int, __value: str) -> None: ...
 def SetValueEx(
     __key: _KeyType, __value_name: str, __reserved: Any, __type: int, __value: Union[str, int]
 ) -> None: ...  # reserved is ignored