diff --git a/src/test/cpp/briey/main.cpp b/src/test/cpp/briey/main.cpp
index 0628a75..89161a7 100644
--- a/src/test/cpp/briey/main.cpp
+++ b/src/test/cpp/briey/main.cpp
@@ -14,10 +14,9 @@
 #include <iostream>
 #include <fstream>
 #include <vector>
-
 #include <iomanip>
-
 #include <time.h>
+#include <unistd.h>