diff --git a/DIRECTORY.md b/DIRECTORY.md
index 1414aacf9..0c21b9537 100644
--- a/DIRECTORY.md
+++ b/DIRECTORY.md
@@ -167,7 +167,7 @@
   * Arrays
     * [Permutations](data_structures/arrays/permutations.py)
     * [Prefix Sum](data_structures/arrays/prefix_sum.py)
-    * [Product Sum Array](data_structures/arrays/product_sum.py)
+    * [Product Sum](data_structures/arrays/product_sum.py)
   * Binary Tree
     * [Avl Tree](data_structures/binary_tree/avl_tree.py)
     * [Basic Binary Tree](data_structures/binary_tree/basic_binary_tree.py)