diff --git a/resources/setting_visibility/expert.cfg b/resources/setting_visibility/expert.cfg
index 6517728968..cab4bb7d8f 100644
--- a/resources/setting_visibility/expert.cfg
+++ b/resources/setting_visibility/expert.cfg
@@ -60,6 +60,7 @@ skin_monotonic
 connect_skin_polygons
 skin_angles
 small_skin_width
+small_skin_on_surface
 skin_no_small_gaps_heuristic
 skin_outline_count
 ironing_enabled