diff --git a/demos/widget-factory/widget-factory.c b/demos/widget-factory/widget-factory.c
index 9f93a29025..76bc11f714 100644
--- a/demos/widget-factory/widget-factory.c
+++ b/demos/widget-factory/widget-factory.c
@@ -1364,6 +1364,8 @@ activate (GApplication *app)
   g_signal_connect (dialog, "response", G_CALLBACK (close_dialog), NULL);
   widget = (GtkWidget *)gtk_builder_get_object (builder, "preference_dialog_button");
   g_signal_connect (widget, "clicked", G_CALLBACK (show_dialog), dialog);
+  widget = (GtkWidget *)gtk_builder_get_object (builder, "circular_button");
+  g_signal_connect (widget, "clicked", G_CALLBACK (show_dialog), dialog);
 
   dialog = (GtkWidget *)gtk_builder_get_object (builder, "selection_dialog");
   widget = (GtkWidget *)gtk_builder_get_object (builder, "text3");
diff --git a/demos/widget-factory/widget-factory.ui b/demos/widget-factory/widget-factory.ui
index 31a110b42c..a0b78d3c22 100644
--- a/demos/widget-factory/widget-factory.ui
+++ b/demos/widget-factory/widget-factory.ui
@@ -2999,7 +2999,7 @@ microphone-sensitivity-medium-symbolic</property>
                           </object>
                         </child>
                         <child>
-                          <object class="GtkButton">
+                          <object class="GtkButton" id="circular_button">
                             <property name="visible">True</property>
                             <style>
                               <class name="image-button"/>