diff --git a/src/trust-tree-scene.cpp b/src/trust-tree-scene.cpp
index 718b207..3a23718 100644
--- a/src/trust-tree-scene.cpp
+++ b/src/trust-tree-scene.cpp
@@ -11,6 +11,7 @@
 #include "trust-tree-scene.hpp"
 
 #include <QtGui>
+#include <QGraphicsTextItem>
 
 #ifndef Q_MOC_RUN
 #include <assert.h>
@@ -21,7 +22,7 @@
 
 static const double Pi = 3.14159265358979323846264338327950288419717;
 
-TrustTreeScene::TrustTreeScene(QWidget* parent)
+TrustTreeScene::TrustTreeScene(QObject* parent)
   : QGraphicsScene(parent)
 {
 }