diff --git a/src/apprt/gtk/class/application.zig b/src/apprt/gtk/class/application.zig
index cc070240c..a61f7d5e5 100644
--- a/src/apprt/gtk/class/application.zig
+++ b/src/apprt/gtk/class/application.zig
@@ -728,6 +728,7 @@ pub const Application = extern struct {
             .command_finished => return Action.commandFinished(target, value),
 
             // Unimplemented
+            .new_window_layout,
             .secure_input,
             .close_all_windows,
             .float_window,