diff --git a/DIRECTORY.md b/DIRECTORY.md
index b97b83cca..d9ca3ae36 100644
--- a/DIRECTORY.md
+++ b/DIRECTORY.md
@@ -100,6 +100,7 @@
   * [Fast Power](https://github.com/TheAlgorithms/C-Plus-Plus/blob/master/math/fast_power.cpp)
   * [Greatest Common Divisor](https://github.com/TheAlgorithms/C-Plus-Plus/blob/master/math/greatest_common_divisor.cpp)
   * [Greatest Common Divisor Euclidean](https://github.com/TheAlgorithms/C-Plus-Plus/blob/master/math/greatest_common_divisor_euclidean.cpp)
+  * [Modular Inverse Fermat Little Theorem](https://github.com/TheAlgorithms/C-Plus-Plus/blob/master/math/modular_inverse_fermat_little_theorem.cpp)
   * [Number Of Positive Divisors](https://github.com/TheAlgorithms/C-Plus-Plus/blob/master/math/number_of_positive_divisors.cpp)
   * [Power For Huge Numbers](https://github.com/TheAlgorithms/C-Plus-Plus/blob/master/math/power_for_huge_numbers.cpp)
   * [Prime Factorization](https://github.com/TheAlgorithms/C-Plus-Plus/blob/master/math/prime_factorization.cpp)