diff --git a/shell/browser/ui/electron_gtk.sigs b/shell/browser/ui/electron_gtk.sigs
index 568a270165cb..451fc74a953d 100644
--- a/shell/browser/ui/electron_gtk.sigs
+++ b/shell/browser/ui/electron_gtk.sigs
@@ -3,4 +3,5 @@ void gtk_native_dialog_set_modal(GtkNativeDialog* self, gboolean modal);
 void gtk_native_dialog_show(GtkNativeDialog* self);
 void gtk_native_dialog_hide(GtkNativeDialog* self);
 gint gtk_native_dialog_run(GtkNativeDialog* self);
-void gtk_native_dialog_destroy(GtkNativeDialog* self);
\ No newline at end of file
+void gtk_native_dialog_destroy(GtkNativeDialog* self);
+GType gtk_native_dialog_get_type(void);
\ No newline at end of file