diff --git a/hal/include/IHalCpp.h b/hal/include/IHalCpp.h
index d7e0699..66a4993 100644
--- a/hal/include/IHalCpp.h
+++ b/hal/include/IHalCpp.h
@@ -15,6 +15,7 @@
 #ifndef IHALCPP_H
 #define IHALCPP_H
 #include "StatusCode.h"
+#include <iostream>
 #include <memory>
 constexpr int INVALID_PERIOD = -1;
 constexpr int PERIPHERAL_CHECK_PERIOD_MS = 100;