diff --git a/src/viewer/viewtree.cpp b/src/viewer/viewtree.cpp
--- a/src/viewer/viewtree.cpp
+++ b/src/viewer/viewtree.cpp
@@ -21,6 +21,7 @@
 #include <QFontDatabase>
 #include <QGuiApplication>
 #include <QPainter>
+#include <QPainterPath>
 #include <QItemSelectionModel>
 #include <QStyleHints>
 #include <QToolTip>