diff --git a/src/Gui/DAGView/DAGView.cpp b/src/Gui/DAGView/DAGView.cpp
index d026e245f5..a69eec18a7 100644
--- a/src/Gui/DAGView/DAGView.cpp
+++ b/src/Gui/DAGView/DAGView.cpp
@@ -56,8 +56,8 @@ View::View(QWidget* parentIn): QGraphicsView(parentIn)
 {
   this->setRenderHint(QPainter::Antialiasing, true);
   this->setRenderHint(QPainter::TextAntialiasing, true);
-  Application::Instance->signalActiveDocument.connect(boost::bind(&View::slotActiveDocument, this, bp::_1));
-  Application::Instance->signalDeleteDocument.connect(boost::bind(&View::slotDeleteDocument, this, bp::_1));
+  conActive = Application::Instance->signalActiveDocument.connect(boost::bind(&View::slotActiveDocument, this, bp::_1));
+  conDelete = Application::Instance->signalDeleteDocument.connect(boost::bind(&View::slotDeleteDocument, this, bp::_1));
   
   //just update the dagview when the gui process is idle.
   connect(QAbstractEventDispatcher::instance(), SIGNAL(awake()), this, SLOT(awakeSlot()));
@@ -65,8 +65,6 @@ View::View(QWidget* parentIn): QGraphicsView(parentIn)
 
 View::~View()
 {
-  Application::Instance->signalActiveDocument.disconnect(boost::bind(&View::slotActiveDocument, this, bp::_1));
-  Application::Instance->signalDeleteDocument.disconnect(boost::bind(&View::slotDeleteDocument, this, bp::_1));
 }
 
 void View::slotActiveDocument(const Document &documentIn)
diff --git a/src/Gui/DAGView/DAGView.h b/src/Gui/DAGView/DAGView.h
index 610bedf4c7..7a82dbe415 100644
--- a/src/Gui/DAGView/DAGView.h
+++ b/src/Gui/DAGView/DAGView.h
@@ -26,6 +26,7 @@
 #include <memory>
 
 #include <QGraphicsView>
+#include <boost_signals2.hpp>
 
 #include <Gui/DockWindow.h>
 #include <Gui/Document.h>
@@ -56,6 +57,8 @@ namespace Gui
       
       typedef std::map<const Gui::Document*, std::shared_ptr<Model> > ModelMap;
       ModelMap modelMap;
+      boost::signals2::scoped_connection conActive;
+      boost::signals2::scoped_connection conDelete;
     };
     
     //! @brief dock window for DAG viewer
@@ -64,7 +67,7 @@ namespace Gui
         Q_OBJECT
     public:
         DockWindow(Gui::Document* gDocumentIn = 0, QWidget *parent = 0);
-        ~DockWindow(){};
+        ~DockWindow(){}
 
     private:
         View *dagView;