diff --git a/tasks/task_2/trubin_a_barber/main.cpp b/tasks/task_2/trubin_a_barber/main.cpp
index 564210ded..9d61107cd 100755
--- a/tasks/task_2/trubin_a_barber/main.cpp
+++ b/tasks/task_2/trubin_a_barber/main.cpp
@@ -1,5 +1,6 @@
 // Copyright 2023 Trubin Artem
 #include <gtest/gtest.h>
+#include <mpi.h>
 #include "./sleeping_barber.h"
 
 TEST(Sleeping_barber, Test_Serve) {