diff --git a/stdlib/2/__builtin__.pyi b/stdlib/2/__builtin__.pyi
index 259c028c5..4094478f8 100644
--- a/stdlib/2/__builtin__.pyi
+++ b/stdlib/2/__builtin__.pyi
@@ -619,7 +619,7 @@ class set(MutableSet[_T], Generic[_T]):
     def __gt__(self, s: AbstractSet[Any]) -> bool: ...
     # TODO more set operations
 
-class frozenset(FrozenSet[_T], Generic[_T]):
+class frozenset(AbstractSet[_T], Generic[_T]):
     @overload
     def __init__(self) -> None: ...
     @overload
diff --git a/stdlib/3/builtins.pyi b/stdlib/3/builtins.pyi
index b0669b118..ecfbad5ca 100644
--- a/stdlib/3/builtins.pyi
+++ b/stdlib/3/builtins.pyi
@@ -666,7 +666,7 @@ class set(MutableSet[_T], Generic[_T]):
     def __gt__(self, s: AbstractSet[Any]) -> bool: ...
     # TODO more set operations
 
-class frozenset(FrozenSet[_T], Generic[_T]):
+class frozenset(AbstractSet[_T], Generic[_T]):
     def __init__(self, iterable: Iterable[_T] = ...) -> None: ...
     def copy(self) -> frozenset[_T]: ...
     def difference(self, *s: Iterable[Any]) -> frozenset[_T]: ...