diff --git a/core/include/Data/SqpDateTime.h b/core/include/Data/SqpDateTime.h
index af1ad77..7ecec9f 100644
--- a/core/include/Data/SqpDateTime.h
+++ b/core/include/Data/SqpDateTime.h
@@ -1,6 +1,7 @@
 #ifndef SCIQLOP_SQPDATETIME_H
 #define SCIQLOP_SQPDATETIME_H
 
+#include <QObject>
 /**
  * @brief The SqpDateTime struct holds the information of time parameters
  */
@@ -16,4 +17,7 @@ struct SqpDateTime {
     }
 };
 
+// Required for using shared_ptr in signals/slots
+Q_DECLARE_METATYPE(SqpDateTime)
+
 #endif // SCIQLOP_SQPDATETIME_H