diff --git a/demos/gtk-demo/tree_store.c b/demos/gtk-demo/tree_store.c
index 36c5948..6383ab7 100644
--- a/demos/gtk-demo/tree_store.c
+++ b/demos/gtk-demo/tree_store.c
@@ -52,9 +52,9 @@ enum
 /* tree data */
 static TreeItem item_name_0[] =
 {
-  {"A", TRUE, TRUE, TRUE, NULL },
-  {"B", FALSE, TRUE, FALSE, NULL },
-  {"C", FALSE, TRUE, FALSE, NULL },
+  { "A", TRUE, TRUE, TRUE, NULL },
+  { "B", FALSE, TRUE, FALSE, NULL },
+  { "C", FALSE, TRUE, FALSE, NULL },
   { NULL }
 };
 
@@ -76,9 +76,9 @@ static TreeItem item_name_2[] =
 
 static TreeItem toplevel[] =
 {
-  {"IT-0", FALSE, FALSE, FALSE, item_name_0},
-  {"IT-1", FALSE, FALSE, FALSE, item_name_1},
-  {"IT-2", FALSE, FALSE, FALSE, item_name_2},
+  { "IT-0", FALSE, FALSE, FALSE, item_name_0 },
+  { "IT-1", FALSE, FALSE, FALSE, item_name_1 },
+  { "IT-2", FALSE, FALSE, FALSE, item_name_2 },
   { NULL }
 };
 
@@ -264,7 +264,7 @@ do_tree_store (GtkWidget *do_widget)
       /* expand all rows after the treeview widget has been realized */
       g_signal_connect (treeview, "realize",
                         G_CALLBACK (gtk_tree_view_expand_all), NULL);
-      gtk_window_set_default_size (GTK_WINDOW (window), 650, 400);
+      gtk_window_set_default_size (GTK_WINDOW (window), 200, 350);
     }
 
   if (!gtk_widget_get_visible (window))