diff --git a/code/modules/client/preferences.dm b/code/modules/client/preferences.dm
index b25c6e1076..f7f071aa19 100755
--- a/code/modules/client/preferences.dm
+++ b/code/modules/client/preferences.dm
@@ -1230,7 +1230,9 @@ datum/preferences
 							if("Prothesis")
 								organ_data[limb] = "cyborg"
 								if(second_limb)
-									organ_data[second_limb] = "cyborg"
+									organ_data[second_limb] = "cyborg"
+								if(organ_data[third_limb] == "amputated")
+									organ_data[third_limb] = null
 
 					if("organs")
 						var/organ_name = input(user, "Which internal function do you want to change?") as null|anything in list("Heart", "Eyes")