diff --git a/Lib/shutil.py b/Lib/shutil.py
index d47c67c..aafe04e 100644
--- a/Lib/shutil.py
+++ b/Lib/shutil.py
@@ -737,8 +737,8 @@
         except KeyError:
             raise ValueError("Unknown unpack format '{0}'".format(format))
 
-        func = format_info[0]
-        func(filename, extract_dir, **dict(format_info[1]))
+        func = format_info[1]
+        func(filename, extract_dir, **dict(format_info[2]))
     else:
         # we need to look at the registered unpackers supported extensions
         format = _find_unpack_format(filename)