diff --git a/middleware/StateMachine/include/IStateMachine.h b/middleware/StateMachine/include/IStateMachine.h
index e614572c..5bfec38a 100644
--- a/middleware/StateMachine/include/IStateMachine.h
+++ b/middleware/StateMachine/include/IStateMachine.h
@@ -15,7 +15,9 @@
 #ifndef I_STATE_MACHINE_H
 #define I_STATE_MACHINE_H
 #include "StatusCode.h"
+#include <iostream>
 #include <memory>
+
 class VStateMessage
 {
 public: