diff --git a/stdlib/2/inspect.pyi b/stdlib/2/inspect.pyi
index 67be3a41a..b1acc3040 100644
--- a/stdlib/2/inspect.pyi
+++ b/stdlib/2/inspect.pyi
@@ -52,7 +52,7 @@ def isgetsetdescriptor(object: object) -> bool: ...
 def ismemberdescriptor(object: object) -> bool: ...
 
 # Retrieving source code
-_SourceObjectType = Union[ModuleType, Type[Any], MethodType, FunctionType, TracebackType, FrameType, CodeType]
+_SourceObjectType = Union[ModuleType, Type[Any], MethodType, FunctionType, TracebackType, FrameType, CodeType, Callable[..., Any]]
 
 def findsource(object: _SourceObjectType) -> Tuple[List[str], int]: ...
 def getabsfile(object: _SourceObjectType) -> str: ...