diff --git a/oscar/SleepLib/deviceconnection.h b/oscar/SleepLib/deviceconnection.h
index 10f48cab..f56bc031 100644
--- a/oscar/SleepLib/deviceconnection.h
+++ b/oscar/SleepLib/deviceconnection.h
@@ -13,6 +13,7 @@
 // connections to devices. For now it just supports serial ports.
 
 #include <QtSerialPort/QSerialPort>
+#include <QXmlStreamWriter>
 #include <QHash>
 #include <QVariant>