diff --git a/math/factorial.cpp b/math/factorial.cpp
index 183f812ef..83b7c5fc8 100644
--- a/math/factorial.cpp
+++ b/math/factorial.cpp
@@ -10,7 +10,6 @@
  * @author [Akshay Gupta](https://github.com/Akshay1910)
  */
 
-#include <cstdint>   /// for uint64_t
 #include <iostream>  /// for I/O operations
 #include <cassert>   /// for assert