diff --git a/sources/instruments/curvelineinstrument.h b/sources/instruments/curvelineinstrument.h

index db2af2d..b40a3f7 100644

--- a/sources/instruments/curvelineinstrument.h

+++ b/sources/instruments/curvelineinstrument.h

@@ -31,6 +31,8 @@

 #include <QtCore/QObject>

 #include <QtCore/QPoint>

+#include <QPainterPath>

+

 class CurveLineInstrument : public AbstractInstrument

 {

     Q_OBJECT