diff --git a/demos/widget-factory/widget-factory.ui b/demos/widget-factory/widget-factory.ui
index 9a4a37dd4e..bc1535f012 100644
--- a/demos/widget-factory/widget-factory.ui
+++ b/demos/widget-factory/widget-factory.ui
@@ -3020,6 +3020,7 @@ microphone-sensitivity-medium-symbolic</property>
                             <property name="visible">True</property>
                             <property name="can_focus">True</property>
                             <property name="expand">False</property>
+                            <property name="expanded">True</property>
                             <child>
                               <object class="GtkScrolledWindow" id="scrolledwindow3">
                                 <property name="visible">True</property>