diff --git a/cpu_scheduling_algorithms/fcfs_scheduling.cpp b/cpu_scheduling_algorithms/fcfs_scheduling.cpp
index 4fc61af6b..6eab989e4 100644
--- a/cpu_scheduling_algorithms/fcfs_scheduling.cpp
+++ b/cpu_scheduling_algorithms/fcfs_scheduling.cpp
@@ -11,6 +11,7 @@
 
 #include <algorithm>      /// for sorting
 #include <cassert>        /// for assert
+#include <cstdint>        /// for integral typedefs
 #include <cstdlib>        /// random number generation
 #include <ctime>          /// for time
 #include <iomanip>        /// for formatting the output