diff --git a/Polyhedron/demo/Polyhedron/MainWindow.cpp b/Polyhedron/demo/Polyhedron/MainWindow.cpp
index 226aab568ab..a65998b825f 100644
--- a/Polyhedron/demo/Polyhedron/MainWindow.cpp
+++ b/Polyhedron/demo/Polyhedron/MainWindow.cpp
@@ -1069,7 +1069,7 @@ void MainWindow::selectSceneItem(int i)
       proxyModel->mapSelectionFromSource(scene->createSelection(i));
 
     sceneView->selectionModel()->select(s,
-                                        QItemSelectionModel::Select);
+                                        QItemSelectionModel::ClearAndSelect);
   }
 }
 
diff --git a/Polyhedron/demo/Polyhedron/Scene.h b/Polyhedron/demo/Polyhedron/Scene.h
index 8b31c645fdc..1ee894b50b4 100644
--- a/Polyhedron/demo/Polyhedron/Scene.h
+++ b/Polyhedron/demo/Polyhedron/Scene.h
@@ -184,9 +184,8 @@ public Q_SLOTS:
   void setSelectedItemIndex(int i)
   {
     selected_item = i;
-    Q_EMIT selectionChanged(i);
   }
-  //! Same as setSelectedItemIndex.
+  //! Clears the current selection then sets the selected item to the target index.
   void setSelectedItem(int i )
   {
     selected_item = i;