diff --git a/src/app/dialogs/tools/dialogtriangle.cpp b/src/app/dialogs/tools/dialogtriangle.cpp
index 9948f90f0..173758f1e 100644
--- a/src/app/dialogs/tools/dialogtriangle.cpp
+++ b/src/app/dialogs/tools/dialogtriangle.cpp
@@ -197,6 +197,15 @@ void DialogTriangle::PointNameChanged()
     CheckState();
 }
 
+//---------------------------------------------------------------------------------------------------------------------
+void DialogTriangle::UpdateList()
+{
+    /*
+     * Does nothing. We redefine this slot because it is only one now way block update list of variable.
+     * This dialog doesn't work with formula. Don't delete. Help avoid crash.
+     */
+}
+
 //---------------------------------------------------------------------------------------------------------------------
 void DialogTriangle::ShowVisualization()
 {
diff --git a/src/app/dialogs/tools/dialogtriangle.h b/src/app/dialogs/tools/dialogtriangle.h
index 51c2e52b7..9ca29765c 100644
--- a/src/app/dialogs/tools/dialogtriangle.h
+++ b/src/app/dialogs/tools/dialogtriangle.h
@@ -65,6 +65,7 @@ public:
 public slots:
     virtual void   ChosenObject(quint32 id, const SceneObject &type);
     virtual void   PointNameChanged();
+    virtual void   UpdateList();
 protected:
     virtual void   ShowVisualization();
     /**