diff --git a/DIRECTORY.md b/DIRECTORY.md
index 1beaebe69..2ac65e4e1 100644
--- a/DIRECTORY.md
+++ b/DIRECTORY.md
@@ -198,3 +198,4 @@
 ## Strings
   * [Brute Force String Searching](https://github.com/TheAlgorithms/C-Plus-Plus/blob/master/strings/brute_force_string_searching.cpp)
   * [Knuth Morris Pratt](https://github.com/TheAlgorithms/C-Plus-Plus/blob/master/strings/knuth_morris_pratt.cpp)
+  * [Rabin Karp](https://github.com/TheAlgorithms/C-Plus-Plus/blob/master/strings/rabin_karp.cpp)