diff -r df1db657bbb4 -r 48b23e6f26d9 QTfrontend/model/ThemeModel.h
--- a/QTfrontend/model/ThemeModel.h	Thu Mar 22 16:08:33 2018 +0100
+++ b/QTfrontend/model/ThemeModel.h	Thu Mar 22 16:52:04 2018 +0100
@@ -28,6 +28,7 @@
 #include <QStringList>
 #include <QMap>
 #include <QIcon>
+#include <QTextStream>
 
 #include "ThemeFilterProxyModel.h"
 #include "DataManager.h"