diff --git a/builtins/2.7/__builtin__.pyi b/builtins/2.7/__builtin__.pyi
index d57c2fe34..692fdcf0a 100644
--- a/builtins/2.7/__builtin__.pyi
+++ b/builtins/2.7/__builtin__.pyi
@@ -550,6 +550,7 @@ class set(MutableSet[_T], Generic[_T]):
     def issubset(self, s: AbstractSet[_T]) -> bool: ...
     def update(self, s: AbstractSet[_T]) -> None: ...
     def difference_update(self, s: AbstractSet[_T]) -> None: ...
+    def discard(self, element: _T) -> None: ...
     def intersection_update(self, s: AbstractSet[_T]) -> None: ...
     def __len__(self) -> int: ...
     def __contains__(self, o: object) -> bool: ...