diff --git a/stdlib/3/http/cookies.pyi b/stdlib/3/http/cookies.pyi
index b693aa7f7..78223a7d8 100644
--- a/stdlib/3/http/cookies.pyi
+++ b/stdlib/3/http/cookies.pyi
@@ -18,7 +18,7 @@ class Morsel(Dict[str, str], Generic[_T]):
     def js_output(self, attrs: Optional[List[str]] = ...) -> str: ...
     def OutputString(self, attrs: Optional[List[str]] = ...) -> str: ...
 
-class BaseCookie(MutableMapping[str, Morsel], Generic[_T]):
+class BaseCookie(Dict[str, Morsel], Generic[_T]):
     def __init__(self, input: Optional[_DataType] = ...) -> None: ...
     def value_decode(self, val: str) -> _T: ...
     def value_encode(self, val: _T) -> str: ...