Bug: https://bugs.gentoo.org/924488
--- a/tests/ibus-hangul.c
+++ b/tests/ibus-hangul.c
@@ -261,7 +261,7 @@ create_window ()
                       G_CALLBACK (window_inserted_text_cb), entry);
     gtk_container_add (GTK_CONTAINER (window), entry);
     gtk_widget_show_all (window);
-    gtk_window_present (window);
+    gtk_window_present (GTK_WINDOW(window));
 }
 
 static void