diff --git a/stdlib/2.7/__builtin__.pyi b/stdlib/2.7/__builtin__.pyi
index 5ada4b178..77706d489 100644
--- a/stdlib/2.7/__builtin__.pyi
+++ b/stdlib/2.7/__builtin__.pyi
@@ -759,6 +759,7 @@ class buffer(Sized):
 
 class BaseException:
     args = ...  # type: Any
+    message = ...  # type: str
     def __init__(self, *args: Any) -> None: ...
     def with_traceback(self, tb: Any) -> BaseException: ...
 class GeneratorExit(BaseException): ...
diff --git a/stdlib/3/builtins.pyi b/stdlib/3/builtins.pyi
index 1fb9f2b07..cbf96d2c2 100644
--- a/stdlib/3/builtins.pyi
+++ b/stdlib/3/builtins.pyi
@@ -728,6 +728,7 @@ Ellipsis = ...  # type: ellipsis
 
 class BaseException:
     args = ...  # type: Any
+    message = ...  # type: str
     def __init__(self, *args: Any) -> None: ...
     def with_traceback(self, tb: Any) -> BaseException: ...