diff --git a/demos/constraint-editor/constraint-editor-window.c b/demos/constraint-editor/constraint-editor-window.c
index 001eab3ba2..ac724993e4 100644
--- a/demos/constraint-editor/constraint-editor-window.c
+++ b/demos/constraint-editor/constraint-editor-window.c
@@ -487,8 +487,6 @@ constraint_editor_window_class_init (ConstraintEditorWindowClass *class)
   GObjectClass *object_class = G_OBJECT_CLASS (class);
   GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (class);
 
-  g_type_ensure (CONSTRAINT_VIEW_TYPE);
-
   object_class->finalize = constraint_editor_window_finalize;
 
   gtk_widget_class_set_template_from_resource (widget_class,
diff --git a/demos/constraint-editor/constraint-view.h b/demos/constraint-editor/constraint-view.h
index 40e80c8c43..834e606eb7 100644
--- a/demos/constraint-editor/constraint-view.h
+++ b/demos/constraint-editor/constraint-view.h
@@ -23,6 +23,7 @@
 
 #define CONSTRAINT_VIEW_TYPE (constraint_view_get_type ())
 
+G_MODULE_EXPORT
 G_DECLARE_FINAL_TYPE (ConstraintView, constraint_view, CONSTRAINT, VIEW, GtkWidget)
 
 ConstraintView * constraint_view_new (void);