diff --git a/GraphicsView/src/CGALQt4/utility.cpp b/GraphicsView/src/CGALQt4/utility.cpp
index d9ec6c6b20c..417e205e059 100644
--- a/GraphicsView/src/CGALQt4/utility.cpp
+++ b/GraphicsView/src/CGALQt4/utility.cpp
@@ -41,6 +41,7 @@ QRectF viewportsBbox(const QGraphicsScene* scene) {
    {
      rect |= mapToScene(view, view->viewport()->rect());
    }
+   rect = rect.normalized();
    return rect;
 }