diff --git a/stdlib/2/typing.pyi b/stdlib/2/typing.pyi
index d8c49a421..e06ebe688 100644
--- a/stdlib/2/typing.pyi
+++ b/stdlib/2/typing.pyi
@@ -115,7 +115,7 @@ class Generator(Iterator[_T_co], Generic[_T_co, _T_contra, _V_co]):
     @abstractmethod
     def throw(self, typ: Type[BaseException], val: Optional[BaseException] = None,
               # TODO: tb should be TracebackType but that's defined in types
-              tb: Any = None) -> None: ...
+              tb: Any = None) -> _T_co: ...
 
     @abstractmethod
     def close(self) -> None: ...
diff --git a/stdlib/3/typing.pyi b/stdlib/3/typing.pyi
index 71f97ce4c..58a745a5a 100644
--- a/stdlib/3/typing.pyi
+++ b/stdlib/3/typing.pyi
@@ -122,7 +122,7 @@ class Generator(Iterator[_T_co], Generic[_T_co, _T_contra, _V_co]):
 
     @abstractmethod
     def throw(self, typ: Type[BaseException], val: Optional[BaseException] = ...,
-              tb: Optional[TracebackType] = ...) -> None: ...
+              tb: Optional[TracebackType] = ...) -> _T_co: ...
 
     @abstractmethod
     def close(self) -> None: ...
@@ -149,7 +149,7 @@ class Coroutine(Awaitable[_V_co], Generic[_T_co, _T_contra, _V_co]):
 
     @abstractmethod
     def throw(self, typ: Type[BaseException], val: Optional[BaseException] = ...,
-              tb: Optional[TracebackType] = ...) -> None: ...
+              tb: Optional[TracebackType] = ...) -> _T_co: ...
 
     @abstractmethod
     def close(self) -> None: ...