1 files changed, 1 insertions, 1 deletions
diff --git a/siv.c b/siv.c
index 1bd6687..e41465a 100644
--- a/siv.c
+++ b/siv.c
@@ -145,7 +145,7 @@ app_unregister_window (App *app, SivWindow *window)
     if (--app->n_windows == 0)
 	quit (app);
 
-    app->windows = nul_array_remove (app->windows, window);
+    app->windows = nul_array_remove_fast (app->windows, window);
 }
 
 GtkWidget *