diff --git a/source/ubinstall-gtk.c b/source/ubinstall-gtk.c
index d211c12..b6e7a64 100644
--- a/source/ubinstall-gtk.c
+++ b/source/ubinstall-gtk.c
@@ -396,7 +396,7 @@ void on_reboot_accepted(main_window *){
     if (system("reboot")){};
 }
 
-void on_exit_accepted(main_window *widgets){
+void on_exit_accepted(main_window *){
     g_mutex_lock(&main_config.install_mutex);
     if (main_config.install_thread){
         pthread_cancel((pthread_t)main_config.install_thread);