1 files changed, 2 insertions, 2 deletions
diff --git a/Lib/shutil.py b/Lib/shutil.py
index a0d981b..00bffe5 100644
--- a/Lib/shutil.py
+++ b/Lib/shutil.py
@@ -523,7 +523,7 @@ def register_archive_format(name, function, extra_args=None, description=''):
     """
     if extra_args is None:
         extra_args = []
-    if not isinstance(function, collections.Callable):
+    if not callable(function):
         raise TypeError('The %s object is not callable' % function)
     if not isinstance(extra_args, (tuple, list)):
         raise TypeError('extra_args needs to be a sequence')
@@ -616,7 +616,7 @@ def _check_unpack_options(extensions, function, extra_args):
             raise RegistryError(msg % (extension,
                                        existing_extensions[extension]))
 
-    if not isinstance(function, collections.Callable):
+    if not callable(function):
         raise TypeError('The registered function must be a callable')