diff --git a/Packages/Qt_widget/src/CGALQt/Qt_widget_standard_toolbar.C b/Packages/Qt_widget/src/CGALQt/Qt_widget_standard_toolbar.C
index 5662dd7f8f0..1454e6b9194 100644
--- a/Packages/Qt_widget/src/CGALQt/Qt_widget_standard_toolbar.C
+++ b/Packages/Qt_widget/src/CGALQt/Qt_widget_standard_toolbar.C
@@ -138,7 +138,7 @@ namespace CGAL {
   }
   void Qt_widget_standard_toolbar::zoomout()
   {
-    widget->zoom(1/2);
+    widget->zoom(0.5);
     widget->redraw();
   }
   void Qt_widget_standard_toolbar::back()