diff --git a/gui/model.c b/gui/model.c
index f7f6e875..6577dfcf 100644
--- a/gui/model.c
+++ b/gui/model.c
@@ -13,6 +13,11 @@ static GtkTreeModelFlags _queue_model_get_flags(GtkTreeModel *model)
 	return GTK_TREE_MODEL_LIST_ONLY;
 }
 
+static gint _queue_model_get_n_columns(GtkTreeModel *model)
+{
+	return 10;
+}
+
 static void _queue_model_init(GuiQueueModel *model)
 {
 	model->gqm_stamp = g_random_int();
@@ -35,7 +40,8 @@ static void _queue_model_class_init(GuiQueueModelClass *class)
 
 static void _queue_tree_model_init(GtkTreeModelIface *iface)
 {
-	iface->get_flags = _queue_model_get_flags;
+	iface->get_flags     = _queue_model_get_flags;
+	iface->get_n_columns = _queue_model_get_n_columns;
 }
 
 
diff --git a/tests/gui/model.c b/tests/gui/model.c
index 9a81622f..6513b0ef 100644
--- a/tests/gui/model.c
+++ b/tests/gui/model.c
@@ -7,12 +7,14 @@
 static void test_model()
 {
 	GuiQueueModel *model = gui_queue_model_new();
+	GtkTreeModel  *treemodel;
 
 	test_not_equal((void *)model, NULL);
 	test_equal(GTK_IS_TREE_MODEL(model), true);
+	treemodel = GTK_TREE_MODEL(model);
 
-	test_equal(gtk_tree_model_get_flags(GTK_TREE_MODEL(model)),
-		   GTK_TREE_MODEL_LIST_ONLY);
+	test_equal(gtk_tree_model_get_flags(treemodel), GTK_TREE_MODEL_LIST_ONLY);
+	test_equal(gtk_tree_model_get_n_columns(treemodel), 10);
 
 	g_object_unref(model);
 	test_equal(G_IS_OBJECT(model), false);