diff --git a/Lib/inspect.py b/Lib/inspect.py
index bc97efe..d629689 100644
--- a/Lib/inspect.py
+++ b/Lib/inspect.py
@@ -642,13 +642,13 @@
 def getfile(object):
     """Work out which source or compiled file an object was defined in."""
     if ismodule(object):
-        if hasattr(object, '__file__'):
+        if getattr(object, '__file__', None):
             return object.__file__
         raise TypeError('{!r} is a built-in module'.format(object))
     if isclass(object):
         if hasattr(object, '__module__'):
             object = sys.modules.get(object.__module__)
-            if hasattr(object, '__file__'):
+            if getattr(object, '__file__', None):
                 return object.__file__
         raise TypeError('{!r} is a built-in class'.format(object))
     if ismethod(object):