diff --git a/Polyhedron/demo/Polyhedron/FileLoaderDialog.ui b/Polyhedron/demo/Polyhedron/FileLoaderDialog.ui
index fab7d8e5cc3..ab4b8c0ee34 100644
--- a/Polyhedron/demo/Polyhedron/FileLoaderDialog.ui
+++ b/Polyhedron/demo/Polyhedron/FileLoaderDialog.ui
@@ -76,6 +76,9 @@
      <property name="text">
       <string/>
      </property>
+     <property name="checked">
+      <bool>true</bool>
+     </property>
     </widget>
    </item>
   </layout>