diff --git a/recipes/Python/577879_Create_nested_dictionary/recipe-577879.py b/recipes/Python/577879_Create_nested_dictionary/recipe-577879.py
index 3e6c4efb9..99bdfdb5e 100644
--- a/recipes/Python/577879_Create_nested_dictionary/recipe-577879.py
+++ b/recipes/Python/577879_Create_nested_dictionary/recipe-577879.py
@@ -1,4 +1,6 @@
 import os
+from functools import reduce
+
 
 def get_directory_structure(rootdir):
     """