diff --git a/sources/diagramevent/diagrameventinterface.cpp b/sources/diagramevent/diagrameventinterface.cpp
index edd8eb629..5063e7680 100644
--- a/sources/diagramevent/diagrameventinterface.cpp
+++ b/sources/diagramevent/diagrameventinterface.cpp
@@ -23,15 +23,14 @@
 #include <QKeyEvent>
 
 DiagramEventInterface::DiagramEventInterface(Diagram *diagram) :
-	m_diagram(diagram),
-	m_running(false),
-	m_abort(false)
+    QObject{diagram},
+    m_diagram{diagram}
 {
 	m_diagram -> clearSelection();
 }
 
 DiagramEventInterface::~DiagramEventInterface()
-{};
+{}
 
 void DiagramEventInterface::mouseDoubleClickEvent(QGraphicsSceneMouseEvent *event) {
 	Q_UNUSED (event);
diff --git a/sources/diagramevent/diagrameventinterface.h b/sources/diagramevent/diagrameventinterface.h
index b475a1a4a..6eef8e870 100644
--- a/sources/diagramevent/diagrameventinterface.h
+++ b/sources/diagramevent/diagrameventinterface.h
@@ -19,6 +19,7 @@
 #define DIAGRAMEVENTINTERFACE_H
 
 #include <QObject>
+#include <QPointer>
 
 class QGraphicsSceneMouseEvent;
 class QGraphicsSceneWheelEvent;
@@ -63,9 +64,9 @@ class DiagramEventInterface : public QObject
 		void finish(); //Emited when the interface finish is job.
 
 	protected:
-		Diagram *m_diagram;
-		bool m_running;
-		bool m_abort;
+        QPointer<Diagram> m_diagram;
+        bool m_running{false};
+        bool m_abort{false};
 };
 
 #endif // DIAGRAMEVENTINTERFACE_H