diff --git a/tests/examples/gtk/fxtest/fxtest.c b/tests/examples/gtk/fxtest/fxtest.c
index cc1c46a667..f739540322 100644
--- a/tests/examples/gtk/fxtest/fxtest.c
+++ b/tests/examples/gtk/fxtest/fxtest.c
@@ -176,6 +176,7 @@ main (gint argc, gchar * argv[])
   gtk_combo_box_append_text (GTK_COMBO_BOX (combo), "xpro");
   gtk_combo_box_append_text (GTK_COMBO_BOX (combo), "lumaxpro");
   gtk_combo_box_append_text (GTK_COMBO_BOX (combo), "sepia");
+  gtk_combo_box_append_text (GTK_COMBO_BOX (combo), "sin");
   gtk_combo_box_append_text (GTK_COMBO_BOX (combo), "glow");
 
   g_signal_connect (G_OBJECT (combo), "changed", G_CALLBACK (apply_fx), filter);