diff --git a/uncompyle6/semantics/make_function2.py b/uncompyle6/semantics/make_function2.py
index 030ec54e..43f87057 100644
--- a/uncompyle6/semantics/make_function2.py
+++ b/uncompyle6/semantics/make_function2.py
@@ -17,6 +17,9 @@
 All the crazy things we have to do to handle Python functions in Python before 3.0.
 The saga of changes continues in 3.0 and above and in other files.
 """
+
+from itertools import zip_longest
+
 from xdis import code_has_star_arg, code_has_star_star_arg, iscode
 
 from uncompyle6.scanner import Code