diff --git a/src/core/Clock.cpp b/src/core/Clock.cpp
index 35c4c6f..7106436 100644
--- a/src/core/Clock.cpp
+++ b/src/core/Clock.cpp
@@ -1,5 +1,6 @@
 #include <cmath>
 #include <iostream>
+#include <string>
 
 #include "Utils.h"