diff --git a/src/apprt/gtk/notebook.zig b/src/apprt/gtk/notebook.zig
index 5faebd788..9d5f07f05 100644
--- a/src/apprt/gtk/notebook.zig
+++ b/src/apprt/gtk/notebook.zig
@@ -339,7 +339,7 @@ pub const Notebook = union(enum) {
                         c.g_object_unref(tab.box);
                     }
 
-                    c.gtk_window_destroy(tab.window.window);
+                    c.gtk_window_destroy(window.window);
                 }
             },
             .gtk_notebook => |notebook| {