diff --git a/src/apprt/gtk-ng/class/application.zig b/src/apprt/gtk-ng/class/application.zig
index fc6f574d5..4ea85a649 100644
--- a/src/apprt/gtk-ng/class/application.zig
+++ b/src/apprt/gtk-ng/class/application.zig
@@ -381,6 +381,7 @@ pub const Application = extern struct {
             .check_for_updates,
             .undo,
             .redo,
+            .progress_report,
             => {
                 log.warn("unimplemented action={}", .{action});
                 return false;