diff --git a/code/modules/client/preferences.dm b/code/modules/client/preferences.dm
index f6660fa54d..5c25e13e84 100644
--- a/code/modules/client/preferences.dm
+++ b/code/modules/client/preferences.dm
@@ -554,7 +554,7 @@ GLOBAL_LIST_EMPTY(preferences_datums)
 					dat += "</table>"
 
 			for(var/mutant_part in GLOB.all_mutant_parts)
-				if(istype(accessory, /datum/sprite_accessory/mam_body_markings) || istype(accessory, /datum/sprite_accessory/body_markings))
+				if(mutant_part == "body_markings" || mutant_part == "mam_body_markings")
 					continue
 				if(parent.can_have_part(mutant_part))
 					if(!mutant_category)