diff --git a/bit_manipulation/count_of_trailing_ciphers_in_factorial_n.cpp b/bit_manipulation/count_of_trailing_ciphers_in_factorial_n.cpp
index aa2ceb3dd..493094de5 100644
--- a/bit_manipulation/count_of_trailing_ciphers_in_factorial_n.cpp
+++ b/bit_manipulation/count_of_trailing_ciphers_in_factorial_n.cpp
@@ -18,6 +18,7 @@
  */
 
 #include <cassert>   /// for assert
+#include <cstdint>   /// for integral typedefs
 #include <iostream>  /// for IO operations
 
 /**